add missing method to baseblock

worldedit-core/src/main/java/com/sk89q/worldedit/world/block/BaseBlock.java

@@ -299,4 +299,8 @@ public class BaseBlock implements BlockStateHolder<BaseBlock>, TileEntityBlock {
             return blockState.getAsString();
 //        }
     }
+
+    public BlockState toBlockState() {
+        return blockState;
+    }
 }