SPIGOT-5310: Add Chunk.contains

By: md_5 <git@md-5.net>

paper-server/src/main/java/org/bukkit/craftbukkit/CraftChunk.java

@@ -25,7 +25,9 @@ import org.bukkit.ChunkSnapshot;
 import org.bukkit.World;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockState;
+import org.bukkit.block.data.BlockData;
 import org.bukkit.craftbukkit.block.CraftBlock;
+import org.bukkit.craftbukkit.block.data.CraftBlockData;
 import org.bukkit.craftbukkit.util.CraftMagicNumbers;
 import org.bukkit.entity.Entity;
 import org.bukkit.plugin.Plugin;
@@ -211,6 +213,20 @@ public class CraftChunk implements Chunk {
         getHandle().b(ticks);
     }
 
+    @Override
+    public boolean contains(BlockData block) {
+        Preconditions.checkArgument(block != null, "Block cannot be null");
+
+        IBlockData nms = ((CraftBlockData) block).getState();
+        for (ChunkSection section : getHandle().getSections()) {
+            if (section != null && section.getBlocks().a(nms)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     @Override
     public ChunkSnapshot getChunkSnapshot() {
         return getChunkSnapshot(true, false, false);