[1.15.1][Ore Generation]How can I generate my custom OreBlock?

[egod]

I have a custom OreBlock

public class OreLingKi extends OreBlock {
    public OreLingKi() {
        super(Properties.create(Material.ROCK)
                .lightValue(1).harvestLevel(1).hardnessAndResistance(3.0f, 100.0f));
        setRegistryName(Main.MODID,"lingkiore");
    }
}

I want to how to generate it so that I can see in world?

 

I used to do this by

implements IWorldGenerator

but in 1.15.1 that not work.

 

Thanks for help?

[egod]

Solved this problem, but it's not so friendly.

public class ModWorldGen {
    private static final CountRangeConfig copper_cfg = new CountRangeConfig(20,0,0,255);
    private static final int copper_veinsize = 9;

    public static void setupOre(){
        ForgeRegistries.BIOMES.getValues().stream()
        .filter(biome -> biome.getCategory() != Biome.Category.THEEND)
        .filter(biome -> biome.getCategory() != Biome.Category.NETHER)
        .forEach(biome -> {
            biome.addFeature(
                    GenerationStage.Decoration.UNDERGROUND_DECORATION,
                    Feature.ORE.func_225566_b_(
                            new OreFeatureConfig(
                            OreFeatureConfig.FillerBlockType.NATURAL_STONE,
                            BlockHolder.lingkiore.getDefaultState(),
                            copper_veinsize
                            )
                    )
                    .func_227228_a_(Placement.COUNT_RANGE.func_227446_a_(copper_cfg))
            );
        });
    }
}

these func_225566_b_    func_227228_a_    func_227446_a_

are somehow difficult to understand (at least for recent days)