--- a/net/minecraft/world/level/block/MultifaceBlock.java
+++ b/net/minecraft/world/level/block/MultifaceBlock.java
@@ -45,7 +45,7 @@
     private static final VoxelShape NORTH_AABB = Block.a(0.0D, 0.0D, 0.0D, 16.0D, 16.0D, 1.0D);
     private static final VoxelShape SOUTH_AABB = Block.a(0.0D, 0.0D, 15.0D, 16.0D, 16.0D, 16.0D);
     private static final Map<EnumDirection, BlockStateBoolean> PROPERTY_BY_DIRECTION = BlockSprawling.PROPERTY_BY_DIRECTION;
-    private static final Map<EnumDirection, VoxelShape> SHAPE_BY_DIRECTION = (Map) SystemUtils.a((Object) Maps.newEnumMap(EnumDirection.class), (enummap) -> {
+    private static final Map<EnumDirection, VoxelShape> SHAPE_BY_DIRECTION = (Map) SystemUtils.a(Maps.newEnumMap(EnumDirection.class), (enummap) -> { // CraftBukkit - decompile error
         enummap.put(EnumDirection.NORTH, MultifaceBlock.NORTH_AABB);
         enummap.put(EnumDirection.EAST, MultifaceBlock.EAST_AABB);
         enummap.put(EnumDirection.SOUTH, MultifaceBlock.SOUTH_AABB);
@@ -134,7 +134,7 @@
 
         return (IBlockData) Arrays.stream(blockactioncontext.f()).map((enumdirection) -> {
             return this.c(iblockdata, (IBlockAccess) world, blockposition, enumdirection);
-        }).filter(Objects::nonNull).findFirst().orElse((Object) null);
+        }).filter(Objects::nonNull).findFirst().orElse(null); // CraftBukkit - decompile error
     }
 
     @Nullable
@@ -226,7 +226,7 @@
         if (optional.isPresent()) {
             Pair<BlockPosition, EnumDirection> pair = (Pair) optional.get();
 
-            return this.a(generatoraccess, (BlockPosition) pair.getFirst(), (EnumDirection) pair.getSecond(), flag);
+            return this.a(generatoraccess, (BlockPosition) pair.getFirst(), (EnumDirection) pair.getSecond(), flag, blockposition); // CraftBukkit
         } else {
             return false;
         }
@@ -271,7 +271,7 @@
         }
     }
 
-    private boolean a(GeneratorAccess generatoraccess, BlockPosition blockposition, EnumDirection enumdirection, boolean flag) {
+    private boolean a(GeneratorAccess generatoraccess, BlockPosition blockposition, EnumDirection enumdirection, boolean flag, BlockPosition source) { // CraftBukkit
         IBlockData iblockdata = generatoraccess.getType(blockposition);
         IBlockData iblockdata1 = this.c(iblockdata, (IBlockAccess) generatoraccess, blockposition, enumdirection);
 
@@ -280,7 +280,7 @@
                 generatoraccess.A(blockposition).e(blockposition);
             }
 
-            return generatoraccess.setTypeAndData(blockposition, iblockdata1, 2);
+            return org.bukkit.craftbukkit.event.CraftEventFactory.handleBlockSpreadEvent(generatoraccess, source, blockposition, iblockdata1, 2); // CraftBukkit
         } else {
             return false;
         }