@Override
  public boolean onBlockActivated(
      World world,
      int posX,
      int posY,
      int posZ,
      EntityPlayer player,
      int side,
      float blockX,
      float blockY,
      float blockZ) {
    TileEntity tileEntity = world.getTileEntity(posX, posY, posZ);

    if (tileEntity != null && tileEntity instanceof TileEntityLocker) {
      TileEntityLocker tileEntityLocker = (TileEntityLocker) tileEntity;

      if (!player.isSneaking()) {
        tileEntityLocker.openGui(player);
      } else {
        tileEntityLocker.setOpen(!tileEntityLocker.isOpen());
      }
    }

    return true;
  }
  @Override
  public AxisAlignedBB getCollisionBoundingBoxFromPool(World world, int posX, int posY, int posZ) {
    TileEntity tile = world.getTileEntity(posX, posY, posZ);

    if (tile != null) {
      TileEntityLocker locker = (TileEntityLocker) tile;
      return locker.isOpen()
          ? null
          : super.getCollisionBoundingBoxFromPool(world, posX, posY, posZ);
    }

    return super.getCollisionBoundingBoxFromPool(world, posX, posY, posZ);
  }