Added getAllSessionData() to the Conversation API.

By: Alex Bennett <alex.eugene.bennett@gmail.com>

paper-api/src/main/java/org/bukkit/conversations/ConversationContext.java

@@ -11,9 +11,9 @@ import java.util.Map;
  * invocations.
  */
 public class ConversationContext {
-    private Conversable forWhom;
-    private Map<Object, Object> sessionData;
-    private Plugin plugin;
+    private final Conversable forWhom;
+    private final Map<Object, Object> sessionData;
+    private final Plugin plugin;
 
     /**
      * @param plugin The owning plugin.
@@ -45,6 +45,17 @@ public class ConversationContext {
         return forWhom;
     }
 
+    /**
+     * Gets the underlying sessionData map.
+     *
+     * May be directly modified to manipulate session data.
+     *
+     * @return The full sessionData map.
+     */
+    public Map<Object, Object> getAllSessionData() {
+        return sessionData;
+    }
+
     /**
      * Gets session data shared between all {@link Prompt} invocations. Use
      * this as a way to pass data through each Prompt as the conversation