diff --git a/ProtocolLib/src/main/java/com/comphenix/protocol/utility/MinecraftReflection.java b/ProtocolLib/src/main/java/com/comphenix/protocol/utility/MinecraftReflection.java
index da64e19c..ee3f3c8b 100644
--- a/ProtocolLib/src/main/java/com/comphenix/protocol/utility/MinecraftReflection.java
+++ b/ProtocolLib/src/main/java/com/comphenix/protocol/utility/MinecraftReflection.java
@@ -573,6 +573,15 @@ public class MinecraftReflection {
 		}
 	}
 	
+	/**
+	 * Retrieve the EntityHuman class.
+	 * @return The entity human class.
+	 */
+	public static Class<?> getEntityHumanClass() {
+		// Assume its the direct superclass
+		return getEntityPlayerClass().getSuperclass();
+	}
+	
 	/**
 	 * Retrieve the GameProfile class in 1.7.2 and later.
 	 * @return The game profile class.
diff --git a/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/GuavaWrappers.java b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/GuavaWrappers.java
new file mode 100644
index 00000000..29df7a35
--- /dev/null
+++ b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/GuavaWrappers.java
@@ -0,0 +1,251 @@
+package com.comphenix.protocol.wrappers;
+
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import com.comphenix.protocol.wrappers.collection.ConvertedSet;
+import com.google.common.collect.Multimap;
+import com.google.common.collect.Multiset;
+
+/**
+ * Represents wrappers for Minecraft's own version of Guava.
+ * @author Kristian
+ */
+class GuavaWrappers {
+	/**
+	 * Wrap a Bukkit multimap around Minecraft's internal multimap.
+	 * @param multimap - the multimap to wrap.
+	 * @return The Bukkit multimap.
+	 */
+	public static <TKey, TValue> Multimap<TKey, TValue> getBukkitMultimap(
+			final net.minecraft.util.com.google.common.collect.Multimap<TKey, TValue> multimap) {
+		return new Multimap<TKey, TValue>() {
+			public Map<TKey, Collection<TValue>> asMap() {
+				return multimap.asMap();
+			}
+
+			public void clear() {
+				multimap.clear();
+			}
+
+			public boolean containsEntry(Object arg0, Object arg1) {
+				return multimap.containsEntry(arg0, arg1);
+			}
+
+			public boolean containsKey(Object arg0) {
+				return multimap.containsKey(arg0);
+			}
+
+			public boolean containsValue(Object arg0) {
+				return multimap.containsValue(arg0);
+			}
+
+			public Collection<Entry<TKey, TValue>> entries() {
+				return multimap.entries();
+			}
+
+			public boolean equals(Object arg0) {
+				return multimap.equals(arg0);
+			}
+
+			public Collection<TValue> get(TKey arg0) {
+				return multimap.get(arg0);
+			}
+
+			public int hashCode() {
+				return multimap.hashCode();
+			}
+
+			public boolean isEmpty() {
+				return multimap.isEmpty();
+			}
+
+			public Set<TKey> keySet() {
+				return multimap.keySet();
+			}
+
+			public Multiset<TKey> keys() {
+				return getBukkitMultiset(multimap.keys());
+			}
+
+			public boolean put(TKey arg0, TValue arg1) {
+				return multimap.put(arg0, arg1);
+			}
+
+			public boolean putAll(com.google.common.collect.Multimap<? extends TKey, ? extends TValue> arg0) {
+				boolean result = false;
+				
+				// Add each entry
+				for (Entry<? extends TKey, ? extends TValue> entry : arg0.entries()) {
+					result |= multimap.put(entry.getKey(), entry.getValue());
+				}
+				return result;
+			}
+
+			public boolean putAll(TKey arg0, Iterable<? extends TValue> arg1) {
+				return multimap.putAll(arg0, arg1);
+			}
+
+			public boolean remove(Object arg0, Object arg1) {
+				return multimap.remove(arg0, arg1);
+			}
+
+			public Collection<TValue> removeAll(Object arg0) {
+				return multimap.removeAll(arg0);
+			}
+
+			public Collection<TValue> replaceValues(TKey arg0, Iterable<? extends TValue> arg1) {
+				return multimap.replaceValues(arg0, arg1);
+			}
+
+			public int size() {
+				return multimap.size();
+			}
+
+			public Collection<TValue> values() {
+				return multimap.values();
+			}			
+		};
+	}
+	
+	public static <TValue> Multiset<TValue> getBukkitMultiset(net.minecraft.util.com.google.common.collect.Multiset<TValue> multiset2) {
+		return new Multiset<TValue>() {
+			private net.minecraft.util.com.google.common.collect.Multiset<TValue> multiset;
+
+			public int add(TValue arg0, int arg1) {
+				return multiset.add(arg0, arg1);
+			}
+
+			public boolean add(TValue arg0) {
+				return multiset.add(arg0);
+			}
+
+			public boolean addAll(Collection<? extends TValue> c) {
+				return multiset.addAll(c);
+			}
+
+			public void clear() {
+				multiset.clear();
+			}
+
+			public boolean contains(Object arg0) {
+				return multiset.contains(arg0);
+			}
+
+			public boolean containsAll(Collection<?> arg0) {
+				return multiset.containsAll(arg0);
+			}
+
+			public int count(Object arg0) {
+				return multiset.count(arg0);
+			}
+
+			public Set<TValue> elementSet() {
+				return multiset.elementSet();
+			}
+
+			public Set<Multiset.Entry<TValue>> entrySet() {
+				return new ConvertedSet<
+					net.minecraft.util.com.google.common.collect.Multiset.Entry<TValue>, 
+					Multiset.Entry<TValue>>
+				(multiset.entrySet()) {
+					
+					@Override
+					protected com.google.common.collect.Multiset.Entry<TValue> toOuter(
+							net.minecraft.util.com.google.common.collect.Multiset.Entry<TValue> inner) {
+						return getBukkitEntry(inner);
+					}
+
+					@Override
+					protected net.minecraft.util.com.google.common.collect.Multiset.Entry<TValue> toInner(
+							com.google.common.collect.Multiset.Entry<TValue> outer) {
+						throw new UnsupportedOperationException("Cannot convert " + outer);
+					}
+				};
+			}
+
+			public boolean equals(Object arg0) {
+				return multiset.equals(arg0);
+			}
+
+			public int hashCode() {
+				return multiset.hashCode();
+			}
+
+			public boolean isEmpty() {
+				return multiset.isEmpty();
+			}
+
+			public Iterator<TValue> iterator() {
+				return multiset.iterator();
+			}
+
+			public int remove(Object arg0, int arg1) {
+				return multiset.remove(arg0, arg1);
+			}
+
+			public boolean remove(Object arg0) {
+				return multiset.remove(arg0);
+			}
+
+			public boolean removeAll(Collection<?> arg0) {
+				return multiset.removeAll(arg0);
+			}
+
+			public boolean retainAll(Collection<?> arg0) {
+				return multiset.retainAll(arg0);
+			}
+
+			public boolean setCount(TValue arg0, int arg1, int arg2) {
+				return multiset.setCount(arg0, arg1, arg2);
+			}
+
+			public int setCount(TValue arg0, int arg1) {
+				return multiset.setCount(arg0, arg1);
+			}
+
+			public int size() {
+				return multiset.size();
+			}
+
+			public Object[] toArray() {
+				return multiset.toArray();
+			}
+
+			public <T> T[] toArray(T[] a) {
+				return multiset.toArray(a);
+			}
+
+			public String toString() {
+				return multiset.toString();
+			}
+		};
+	}
+	
+	private static <TValue> Multiset.Entry<TValue> getBukkitEntry(final net.minecraft.util.com.google.common.collect.Multiset.Entry<TValue> entry) {
+		return new Multiset.Entry<TValue>() {
+			public boolean equals(Object arg0) {
+				return entry.equals(arg0);
+			}
+
+			public int getCount() {
+				return entry.getCount();
+			}
+
+			public TValue getElement() {
+				return entry.getElement();
+			}
+
+			public int hashCode() {
+				return entry.hashCode();
+			}
+
+			public String toString() {
+				return entry.toString();
+			}
+		};
+	}
+}
diff --git a/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/WrappedGameProfile.java b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/WrappedGameProfile.java
index b1add0a0..3115364a 100644
--- a/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/WrappedGameProfile.java
+++ b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/WrappedGameProfile.java
@@ -3,13 +3,19 @@ package com.comphenix.protocol.wrappers;
 import java.util.UUID;
 
 import org.apache.commons.lang.StringUtils;
+import org.bukkit.entity.Player;
 
+import com.comphenix.protocol.injector.BukkitUnwrapper;
 import com.comphenix.protocol.reflect.accessors.Accessors;
 import com.comphenix.protocol.reflect.accessors.ConstructorAccessor;
 import com.comphenix.protocol.reflect.accessors.FieldAccessor;
+import com.comphenix.protocol.utility.MinecraftReflection;
+import com.comphenix.protocol.wrappers.collection.ConvertedMultimap;
 import com.google.common.base.Objects;
+import com.google.common.collect.Multimap;
 
 import net.minecraft.util.com.mojang.authlib.GameProfile;
+import net.minecraft.util.com.mojang.authlib.properties.Property;
 
 /**
  * Represents a wrapper for a game profile.
@@ -20,12 +26,34 @@ public class WrappedGameProfile extends AbstractWrapper {
 	private static final ConstructorAccessor CREATE_STRING_STRING = Accessors.getConstructorAccessorOrNull(GameProfile.class, String.class, String.class);
 	private static final FieldAccessor GET_UUID_STRING = Accessors.getFieldAcccessorOrNull(GameProfile.class, "id", String.class);
 	
+	// Fetching game profile
+	private static FieldAccessor GET_PROFILE;
+	
+	// Property map
+	private Multimap<String, WrappedSignedProperty> propertyMap;
+	
 	// Profile from a handle
 	private WrappedGameProfile(Object profile) {
 		super(GameProfile.class);
 		setHandle(profile);
 	}
 	
+	/**
+	 * Retrieve the associated game profile of a player.
+	 * @param player - the player.
+	 * @return The game profile.
+	 */
+	public static WrappedGameProfile fromPlayer(Player player) {
+		FieldAccessor accessor = GET_PROFILE;
+		Object nmsPlayer = BukkitUnwrapper.getInstance().unwrapItem(player);
+		
+		if (accessor == null) {
+			accessor = Accessors.getFieldAccessor(MinecraftReflection.getEntityHumanClass(), GameProfile.class, true);
+			GET_PROFILE = accessor;
+		}
+		return WrappedGameProfile.fromHandle(GET_PROFILE.get(nmsPlayer));
+	}
+	
 	/**
 	 * Construct a new game profile with the given properties.
 	 * <p>
@@ -110,6 +138,39 @@ public class WrappedGameProfile extends AbstractWrapper {
 		return getProfile().getName();
 	}
 	
+	/**
+	 * Retrieve the property map of signed values.
+	 * @return Property map.
+	 */
+	public Multimap<String, WrappedSignedProperty> getProperties() {
+		Multimap<String, WrappedSignedProperty> result = propertyMap;
+
+		if (result == null) {
+			result = new ConvertedMultimap<String, Property, WrappedSignedProperty>(
+					GuavaWrappers.getBukkitMultimap(getProfile().getProperties())) {
+				@Override
+				protected Property toInner(WrappedSignedProperty outer) {
+					return (Property) outer.handle;
+				}
+				
+				@Override
+				protected Object toInnerObject(Object outer) {
+					if (outer instanceof WrappedSignedProperty) {
+						return toInner((WrappedSignedProperty) outer);
+					}
+					return outer;
+				}
+				
+				@Override
+				protected WrappedSignedProperty toOuter(Property inner) {
+					return WrappedSignedProperty.fromHandle(inner);
+				}
+			};
+			propertyMap = result;
+		}
+		return result;
+	}
+	
 	/**
 	 * Retrieve the underlying GameProfile.
 	 * @return The GameProfile.
diff --git a/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/WrappedSignedProperty.java b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/WrappedSignedProperty.java
new file mode 100644
index 00000000..9c8d40f7
--- /dev/null
+++ b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/WrappedSignedProperty.java
@@ -0,0 +1,106 @@
+package com.comphenix.protocol.wrappers;
+
+import java.security.PublicKey;
+
+import net.minecraft.util.com.mojang.authlib.properties.Property;
+import com.google.common.base.Objects;
+
+/**
+ * Represents a wrapper over a signed property.
+ * @author Kristian
+ */
+public class WrappedSignedProperty extends AbstractWrapper {
+	/**
+	 * Construct a new wrapped signed property from a given handle.
+	 * @param handle - the handle.
+	 */
+	private WrappedSignedProperty(Object handle) {
+		super(Property.class);
+		setHandle(handle);
+	}
+	
+	/**
+	 * Construct a new signed property from a given NMS property.
+	 * @param handle - the property.
+	 * @return The wrapped signed property.
+	 */
+	public static WrappedSignedProperty fromHandle(Object handle) {
+		return new WrappedSignedProperty(handle);
+	}
+	
+	/**
+	 * Retrieve the underlying signed property.
+	 * @return The GameProfile.
+	 */
+	private Property getProfile() {
+		return (Property) handle;
+	}
+
+	/**
+	 * Retrieve the name of the underlying property, such as "textures".
+	 * @return Name of the property.
+	 */
+	public String getName() {
+		return getProfile().getName();
+	}
+
+	/**
+	 * Retrieve the signature of the property (base64) as returned by the session server's /hasJoined. 
+	 * @return The signature of the property.
+	 */
+	public String getSignature() {
+		return getProfile().getSignature();
+	}
+
+	/**
+	 * Retrieve the value of the property (base64) as return by the session server's /hasJoined 
+	 * @return  The value of the property.
+	 */
+	public String getValue() {
+		return getProfile().getValue();
+	}
+
+	/**
+	 * Determine if this property has a signature.
+	 * @return TRUE if it does, FALSE otherwise.
+	 */
+	public boolean hasSignature() {
+		return getProfile().hasSignature();
+	}
+	
+	/**
+	 * Determine if the signature of this property is valid and signed by the corresponding private key.
+	 * @param key - the public key.
+	 * @return TRUE if it is, FALSE otherwise.
+	 */
+	public boolean isSignatureValid(PublicKey key) {
+		return getProfile().isSignatureValid(key);
+	}
+
+	@Override
+	public int hashCode() {
+		return Objects.hashCode(getName(), getValue(), getSignature());
+	}
+	
+	@Override
+	public boolean equals(Object object){
+		if (object instanceof WrappedSignedProperty) {
+			if (!super.equals(object)) 
+				return false;
+			WrappedSignedProperty that = (WrappedSignedProperty) object;
+			return Objects.equal(this.getName(), that.getName())
+				&& Objects.equal(this.getValue(), that.getValue())
+				&& Objects.equal(this.getSignature(), that.getSignature());
+		}
+		return false;
+	}
+
+	@Override
+	public String toString() {
+		return Objects.toStringHelper(this)
+			.add("name", getName())
+			.add("value", getValue())
+			.add("signature", getSignature())
+			.toString();
+	}
+}
diff --git a/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/AbstractConverted.java b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/AbstractConverted.java
index 7491a5a7..6e27931a 100644
--- a/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/AbstractConverted.java
+++ b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/AbstractConverted.java
@@ -30,6 +30,22 @@ import com.google.common.base.Function;
  * @param <VOuter> - the second type.
  */
 public abstract class AbstractConverted<VInner, VOuter> {
+	// Inner conversion
+	private Function<VOuter, VInner> innerConverter = new Function<VOuter, VInner>() {
+		@Override
+		public VInner apply(@Nullable VOuter param) {
+			return toInner(param);
+		}
+	};
+	
+	// Outer conversion
+	private Function<VInner, VOuter> outerConverter = new Function<VInner, VOuter>() {
+		@Override
+		public VOuter apply(@Nullable VInner param) {
+			return toOuter(param);
+		}
+	};
+	
 	/**
 	 * Convert a value from the inner map to the outer visible map.
 	 * @param inner - the inner value.
@@ -44,16 +60,19 @@ public abstract class AbstractConverted<VInner, VOuter> {
 	 */
 	protected abstract VInner toInner(VOuter outer);
 	
+	/**
+	 * Retrieve a function delegate that converts outer objects to inner objects.
+	 * @return A function delegate.
+	 */
+	protected Function<VOuter, VInner> getInnerConverter() {
+		return innerConverter;
+	}
+	
 	/**
 	 * Retrieve a function delegate that converts inner objects to outer objects.
 	 * @return A function delegate.
 	 */
 	protected Function<VInner, VOuter> getOuterConverter() {
-		return new Function<VInner, VOuter>() {
-			@Override
-			public VOuter apply(@Nullable VInner param) {
-				return toOuter(param);
-			}
-		};
+		return outerConverter;
 	}
 }
diff --git a/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/BiFunction.java b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/BiFunction.java
new file mode 100644
index 00000000..77fd51c5
--- /dev/null
+++ b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/BiFunction.java
@@ -0,0 +1,12 @@
+package com.comphenix.protocol.wrappers.collection;
+
+/**
+ * Represents a function that accepts two parameters.
+ * @author Kristian
+ * @param <T1> - type of the first parameter.
+ * @param <T2> - type of the second parameter.
+ * @param <TResult> - type of the return value.
+ */
+public interface BiFunction<T1, T2, TResult> {
+	public TResult apply(T1 arg1, T2 arg2);
+}
\ No newline at end of file
diff --git a/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/ConvertedMap.java b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/ConvertedMap.java
index 1262c31b..53a1db8f 100644
--- a/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/ConvertedMap.java
+++ b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/ConvertedMap.java
@@ -39,6 +39,22 @@ public abstract class ConvertedMap<Key, VInner, VOuter> extends AbstractConverte
 	// Inner map
 	private Map<Key, VInner> inner;
 
+	// Inner conversion
+	private BiFunction<Key, VOuter, VInner> innerConverter = new BiFunction<Key, VOuter, VInner>() {
+		@Override
+		public VInner apply(Key key, VOuter outer) {
+			return toInner(key, outer);
+		}
+	};
+	
+	// Outer conversion
+	private BiFunction<Key, VInner, VOuter> outerConverter = new BiFunction<Key, VInner, VOuter>() {
+		@Override
+		public VOuter apply(Key key, VInner inner) {
+			return toOuter(key, inner);
+		}
+	};
+	
 	public ConvertedMap(Map<Key, VInner> inner) {
 		if (inner == null)
 			throw new IllegalArgumentException("Inner map cannot be NULL.");
@@ -63,58 +79,7 @@ public abstract class ConvertedMap<Key, VInner, VOuter> extends AbstractConverte
 
 	@Override
 	public Set<Entry<Key, VOuter>> entrySet() {
-		return new ConvertedSet<Entry<Key,VInner>, Entry<Key,VOuter>>(inner.entrySet()) {
-			@Override
-			protected Entry<Key, VInner> toInner(final Entry<Key, VOuter> outer) {
-				return new Entry<Key, VInner>() {
-					@Override
-					public Key getKey() {
-						return outer.getKey();
-					}
-
-					@Override
-					public VInner getValue() {
-						return ConvertedMap.this.toInner(outer.getValue());
-					}
-
-					@Override
-					public VInner setValue(VInner value) {
-						return ConvertedMap.this.toInner(outer.setValue(ConvertedMap.this.toOuter(value))); 
-					}
-					
-					@Override
-					public String toString() {
-						return String.format("\"%s\": %s", getKey(), getValue());
-					}
-				};
-			}
-			
-			@Override
-			protected Entry<Key, VOuter> toOuter(final Entry<Key, VInner> inner) {
-				return new Entry<Key, VOuter>() {
-					@Override
-					public Key getKey() {
-						return inner.getKey();
-					}
-
-					@Override
-					public VOuter getValue() {
-						return ConvertedMap.this.toOuter(inner.getKey(), inner.getValue());
-					}
-
-					@Override
-					public VOuter setValue(VOuter value) {
-						final VInner converted = ConvertedMap.this.toInner(getKey(), value);
-						return ConvertedMap.this.toOuter(getKey(), inner.setValue(converted)); 
-					}
-					
-					@Override
-					public String toString() {
-						return String.format("\"%s\": %s", getKey(), getValue());
-					}
-				};
-			}
-		};
+		return convertedEntrySet(inner.entrySet(), innerConverter, outerConverter);
 	}
 
 	/**
@@ -215,4 +180,70 @@ public abstract class ConvertedMap<Key, VInner, VOuter> extends AbstractConverte
             sb.append(", ");
         }
     }
+    
+    /**
+     * Convert a collection of entries.
+     * @param entries - the collection of entries.
+     * @param innerFunction - the inner entry converter.
+     * @param outerFunction - the outer entry converter.
+     * @return The converted set of entries.
+     */
+	static <Key, VInner, VOuter> Set<Entry<Key, VOuter>> convertedEntrySet(
+			final Collection<Entry<Key, VInner>> entries, 
+			final BiFunction<Key, VOuter, VInner> innerFunction,
+			final BiFunction<Key, VInner, VOuter> outerFunction) {
+		
+		return new ConvertedSet<Entry<Key,VInner>, Entry<Key,VOuter>>(entries) {
+			@Override
+			protected Entry<Key, VInner> toInner(final Entry<Key, VOuter> outer) {
+				return new Entry<Key, VInner>() {
+					@Override
+					public Key getKey() {
+						return outer.getKey();
+					}
+
+					@Override
+					public VInner getValue() {
+						return innerFunction.apply(getKey(), outer.getValue());
+					}
+
+					@Override
+					public VInner setValue(VInner value) {
+						return innerFunction.apply(getKey(), outer.setValue(outerFunction.apply(getKey(), value))); 
+					}
+					
+					@Override
+					public String toString() {
+						return String.format("\"%s\": %s", getKey(), getValue());
+					}
+				};
+			}
+			
+			@Override
+			protected Entry<Key, VOuter> toOuter(final Entry<Key, VInner> inner) {
+				return new Entry<Key, VOuter>() {
+					@Override
+					public Key getKey() {
+						return inner.getKey();
+					}
+
+					@Override
+					public VOuter getValue() {
+						return outerFunction.apply(getKey(), inner.getValue());
+					}
+
+					@Override
+					public VOuter setValue(VOuter value) {
+						final VInner converted = innerFunction.apply(getKey(), value);
+						return outerFunction.apply(getKey(), inner.setValue(converted)); 
+					}
+					
+					@Override
+					public String toString() {
+						return String.format("\"%s\": %s", getKey(), getValue());
+					}
+				};
+			}
+		};
+	}
 }
diff --git a/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/ConvertedMultimap.java b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/ConvertedMultimap.java
new file mode 100644
index 00000000..8a616761
--- /dev/null
+++ b/ProtocolLib/src/main/java/com/comphenix/protocol/wrappers/collection/ConvertedMultimap.java
@@ -0,0 +1,246 @@
+package com.comphenix.protocol.wrappers.collection;
+
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+import javax.annotation.Nullable;
+
+import com.google.common.base.Joiner;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Multimap;
+import com.google.common.collect.Multiset;
+
+/**
+ * Represents a multimap that wraps another multimap by transforming the entries that are going in and out.
+ * @author Kristian
+ *
+ * @param <Key> - the key.
+ * @param <VInner> - the inner value type.
+ * @param <VOuter> - the outer value type.
+ */
+public abstract class ConvertedMultimap<Key, VInner, VOuter> extends AbstractConverted<VInner, VOuter> implements Multimap<Key, VOuter> {
+	// Inner multimap
+	private Multimap<Key, VInner> inner;
+
+	public ConvertedMultimap(Multimap<Key, VInner> inner) {
+		this.inner = Preconditions.checkNotNull(inner, "inner map cannot be NULL.");
+	}
+	
+	/**
+	 * Wrap a given collection.
+	 * @param inner - the inner collection.
+	 * @return The outer collection.
+	 */
+	protected Collection<VOuter> toOuterCollection(Collection<VInner> inner) {
+		return new ConvertedCollection<VInner, VOuter>(inner) {
+			@Override
+			protected VInner toInner(VOuter outer) {
+				return ConvertedMultimap.this.toInner(outer);
+			}
+			
+			@Override
+			protected VOuter toOuter(VInner inner) {
+				return ConvertedMultimap.this.toOuter(inner);
+			}
+			
+			@Override
+			public String toString() {
+				return "[" + Joiner.on(", ").join(this) + "]";
+			}
+		};
+	}
+	
+	/**
+	 * Wrap a given collection.
+	 * @param outer - the outer collection.
+	 * @return The inner collection.
+	 */
+	protected Collection<VInner> toInnerCollection(Collection<VOuter> outer) {
+		return new ConvertedCollection<VOuter, VInner>(outer) {
+			@Override
+			protected VOuter toInner(VInner outer) {
+				return ConvertedMultimap.this.toOuter(outer);
+			}
+			
+			@Override
+			protected VInner toOuter(VOuter inner) {
+				return ConvertedMultimap.this.toInner(inner);
+			}
+			
+			@Override
+			public String toString() {
+				return "[" + Joiner.on(", ").join(this) + "]";
+			}
+		};
+	}
+
+	/**
+	 * Convert to an inner object if its of the correct type, otherwise leave it.
+	 * @param outer - the outer object.
+	 * @return The inner object, or the same object.
+	 */
+	@SuppressWarnings("unchecked")
+	protected Object toInnerObject(Object outer) {
+		return toInner((VOuter) outer);
+	}
+	
+	@Override
+	public int size() {
+		return inner.size();
+	}
+
+	@Override
+	public boolean isEmpty() {
+		return inner.isEmpty();
+	}
+
+	@Override
+	public boolean containsKey(@Nullable Object key) {
+		return inner.containsKey(key);
+	}
+
+	@Override
+	public boolean containsValue(@Nullable Object value) {
+		return inner.containsValue(toInnerObject(value));
+	}
+
+	@Override
+	public boolean containsEntry(@Nullable Object key, @Nullable Object value) {
+		return inner.containsEntry(key, toInnerObject(value));
+	}
+
+	@Override
+	public boolean put(@Nullable Key key, @Nullable VOuter value) {
+		return inner.put(key, toInner(value));
+	}
+
+	@Override
+	public boolean remove(@Nullable Object key, @Nullable Object value) {
+		return inner.remove(key, toInnerObject(value));
+	}
+
+	@Override
+	public boolean putAll(@Nullable Key key, Iterable<? extends VOuter> values) {
+		return inner.putAll(key, Iterables.transform(values, getInnerConverter()));
+	}
+
+	@SuppressWarnings({"rawtypes", "unchecked"})
+	@Override
+	public boolean putAll(Multimap<? extends Key, ? extends VOuter> multimap) {
+		return inner.putAll(new ConvertedMultimap<Key, VOuter, VInner>((Multimap) multimap) {
+			@Override
+			protected VOuter toInner(VInner outer) {
+				return ConvertedMultimap.this.toOuter(outer);
+			}
+						
+			@Override
+			protected VInner toOuter(VOuter inner) {
+				return ConvertedMultimap.this.toInner(inner);
+			}
+		});
+	}
+
+	@Override
+	public Collection<VOuter> replaceValues(@Nullable Key key, Iterable<? extends VOuter> values) {
+		return toOuterCollection(
+			inner.replaceValues(key, Iterables.transform(values, getInnerConverter()))
+		);
+	}
+
+	@Override
+	public Collection<VOuter> removeAll(@Nullable Object key) {
+		return toOuterCollection(inner.removeAll(key));
+	}
+
+	@Override
+	public void clear() {
+		inner.clear();
+	}
+
+	@Override
+	public Collection<VOuter> get(@Nullable Key key) {
+		return toOuterCollection(inner.get(key));
+	}
+
+	@Override
+	public Set<Key> keySet() {
+		return inner.keySet();
+	}
+
+	@Override
+	public Multiset<Key> keys() {
+		return inner.keys();
+	}
+
+	@Override
+	public Collection<VOuter> values() {
+		return toOuterCollection(inner.values());
+	}
+
+	@Override
+	public Collection<Entry<Key, VOuter>> entries() {
+		return ConvertedMap.convertedEntrySet(inner.entries(), 
+			new BiFunction<Key, VOuter, VInner>() {
+				public VInner apply(Key key, VOuter outer) {
+					return toInner(outer);
+				}
+			},
+			new BiFunction<Key, VInner, VOuter>() {
+				public VOuter apply(Key key, VInner inner) {
+					return toOuter(inner);
+				}
+			}
+		);
+	}
+
+	@Override
+	public Map<Key, Collection<VOuter>> asMap() {
+		return new ConvertedMap<Key, Collection<VInner>, Collection<VOuter>>(inner.asMap()) {
+			@Override
+			protected Collection<VInner> toInner(Collection<VOuter> outer) {
+				return toInnerCollection(outer);
+			}
+			
+			@Override
+			protected Collection<VOuter> toOuter(Collection<VInner> inner) {
+				return toOuterCollection(inner);
+			}
+		};
+	}
+	
+    /**
+     * Returns a string representation of this map.  The string representation
+     * consists of a list of key-value mappings in the order returned by the
+     * map's <tt>entrySet</tt> view's iterator, enclosed in braces
+     * (<tt>"{}"</tt>).  Adjacent mappings are separated by the characters
+     * <tt>", "</tt> (comma and space).  Each key-value mapping is rendered as
+     * the key followed by an equals sign (<tt>"="</tt>) followed by the
+     * associated value.  Keys and values are converted to strings as by
+     * {@link String#valueOf(Object)}.
+     *
+     * @return a string representation of this map
+     */
+    public String toString() {
+        Iterator<Entry<Key, VOuter>> i = entries().iterator();
+        if (!i.hasNext())
+            return "{}";
+
+        StringBuilder sb = new StringBuilder();
+        sb.append('{');
+        for (;;) {
+            Entry<Key, VOuter> e = i.next();
+            Key key = e.getKey();
+            VOuter value = e.getValue();
+            sb.append(key   == this ? "(this Map)" : key);
+            sb.append('=');
+            sb.append(value == this ? "(this Map)" : value);
+            if (! i.hasNext())
+                return sb.append('}').toString();
+            sb.append(", ");
+        }
+    }
+}