@Override
public boolean setBlockFast(World world, int x, int y, int z, int blockId, byte data) {
net.minecraft.server.v1_7_R3.World w = ((CraftWorld) world).getHandle();
Chunk chunk = w.getChunkAt(x >> 4, z >> 4);
return chunk.a(x & 0x0f, y, z & 0x0f, Block.e(blockId), data);
}