private void generateStructures(WorldGenerator generator, World world, Random random, int chunkX, int chunkZ, int chance, Class<?>... classes) {
        HighQualityRandom highQualityRandom = new HighQualityRandom();
        ArrayList<Class<?>> classesList = new ArrayList<Class<?>>(Arrays.asList(classes));
        int x = (chunkX * 16) + highQualityRandom.nextInt(15);
        int z = (chunkZ * 16) + highQualityRandom.nextInt(15);
        float y = calculateGenerationHeight(world, x, z);
        for (int xSize = 0; xSize < 9; x++)
        {
            for (int zSize = 0; zSize < 7; z++)
            {
                int oldY = Math.round(y);
                y += calculateGenerationHeight(world, x, z);
                y /= 2;
                if (Math.round(y) != oldY)
                {
                    return;
                }
            }
        }
        int struc_y = (int) y - 1;
        BlockPos pos = new BlockPos(x, struc_y, z);
        Class<?> biome = world.provider.getBiomeForCoords(pos).getClass();
        if (world.getWorldType() != WorldType.FLAT) {
            if (classesList.contains(biome) || classesList.isEmpty()) {
                if (highQualityRandom.nextInt(chance) == 0)
                {

                    generator.generate(world, highQualityRandom, pos);
                }
            }
        }
    }