So I've seen people change rule tests to END_STONE but whenever I try adding it, it errors out.

This is the code I used:

public class ModOreGeneration {

    public static void generateOres(final BiomeLoadingEvent event){
        if(!(event.getCategory().equals(Biome.Category.THEEND))){
            RuleTest END_STONE = new BlockMatchRuleTest(Blocks.END_STONE);
            generateOre(event.getGeneration(), OreFeatureConfig.FillerBlockType.BASE_STONE_OVERWORLD,
                    ModBlocks.COPPER_ORE.get().getDefaultState(),5,15,30,10);
        }
    }

    private static void generateOre(BiomeGenerationSettingsBuilder settings, RuleTest fillerType, BlockState state, int veinSize, int minHeight, int maxHeight, int amount) {
        settings.withFeature(GenerationStage.Decoration.UNDERGROUND_ORES,
                Feature.ORE.withConfiguration(new OreFeatureConfig(fillerType, state, veinSize))
                        .withPlacement(Placement.RANGE.configure(new TopSolidRangeConfig(minHeight, 0, maxHeight)))
                        .square().func_242731_b(amount));
    }

}

 

what kind of error, post it

'OreFeatureConfig(net.minecraft.world.gen.feature.template.RuleTest, net.minecraft.block.BlockState, int)' in 'net.minecraft.world.gen.feature.OreFeatureConfig' cannot be applied to '(net.minecraft.world.gen.feature.template.RuleTest)'