Mod Minecraft Hammer

Multiple markers at this line
 - The method setBlock(int, int, int, boolean) is undefined for the type World
 - The method destroyBlock(BlockPos, boolean) in the type World is not applicable for the arguments (int, int, int, boolean)

public boolean onBlockDestroyed(ItemStack item, World world, Block destroyedBlock, int x, int y, int z, EntityLivingBase entity) {
        for (int ix = -1; x < 2; x++) {
            for (int iy = -1; x < 2; x++) {
                for (int iz = -1; x < 2; x++) {
                    world.setBlock(x+ix, y+iy, z+iz, true);
                }
            }
        }
        return true;
    }