Creating custom biome [1.18.2]

In 1.18 creating biomes is bit different. I'm using DeferredRegister and everything was almost done but got stuck at the end. The biome object class is fine, but I have problems registring? (or I think its something to do with world generation?) the biomes. There ware some fields and methods that as the compiler said ware 'not visible'. I don't know very well how to use reflection, so I used AccessTransformers. Managed to make all necessary fields/methods visible apart from one constructor. How can I change this constructor visible? Or should I do this in some different way?

In my main class:

	@SubscribeEvent
	public static void onServerAboutToStart(ServerAboutToStartEvent event) {
		MinecraftServer server = event.getServer();
		Registry<DimensionType> dimensionTypeRegistry = server.registryAccess().registryOrThrow(Registry.DIMENSION_TYPE_REGISTRY);
		Registry<Biome> biomeRegistry = server.registryAccess().registryOrThrow(Registry.BIOME_REGISTRY);
		WorldGenSettings worldGenSettings = server.getWorldData().worldGenSettings();
		for (Map.Entry<ResourceKey<LevelStem>, LevelStem> entry : worldGenSettings.dimensions().entrySet()) {
			DimensionType dimensionType = entry.getValue().typeHolder().value();
			if (dimensionType == dimensionTypeRegistry.getOrThrow(DimensionType.OVERWORLD_LOCATION)) {
				ChunkGenerator chunkGenerator = entry.getValue().generator();
				// Inject biomes to biome source
				if (chunkGenerator.getBiomeSource() instanceof MultiNoiseBiomeSource noiseSource) {
					List<Pair<Climate.ParameterPoint, Holder<Biome>>> parameters = new ArrayList<>(noiseSource.parameters.values());
					parameters.add(new Pair<>(AirportBiome.PARAMETER_POINT,
						biomeRegistry.getOrCreateHolder(ResourceKey.create(Registry.BIOME_REGISTRY, ModBiomes.AIRPORT_BIOME.getId()))));

					//Next line gives error: The constructor 'MultiNoiseBiomeSource' is not visible.
					MultiNoiseBiomeSource moddedNoiseSource = new MultiNoiseBiomeSource(new Climate.ParameterList<>(parameters), noiseSource.preset);
					
					chunkGenerator.biomeSource = moddedNoiseSource;
					chunkGenerator.runtimeBiomeSource = moddedNoiseSource;
				}
				// Inject surface rules
				if (chunkGenerator instanceof NoiseBasedChunkGenerator noiseGenerator) {
					NoiseGeneratorSettings noiseGeneratorSettings = noiseGenerator.settings.value();
					SurfaceRules.RuleSource currentRuleSource = noiseGeneratorSettings.surfaceRule();
					if (currentRuleSource instanceof SurfaceRules.SequenceRuleSource sequenceRuleSource) {
						List<SurfaceRules.RuleSource> surfaceRules = new ArrayList<>(sequenceRuleSource.sequence());
						surfaceRules.add(1, preliminarySurfaceRule(ResourceKey.create(Registry.BIOME_REGISTRY, ModBiomes.AIRPORT_BIOME.getId()),
							Blocks.LIGHT_GRAY_CONCRETE.defaultBlockState(), Blocks.SMOOTH_STONE.defaultBlockState(), Blocks.STONE.defaultBlockState()));
						NoiseGeneratorSettings moddedNoiseGeneratorSettings = new NoiseGeneratorSettings(noiseGeneratorSettings.noiseSettings(),
							noiseGeneratorSettings.defaultBlock(), noiseGeneratorSettings.defaultFluid(), noiseGeneratorSettings.noiseRouter(),
							SurfaceRules.sequence(surfaceRules.toArray(i -> new SurfaceRules.RuleSource[i])), noiseGeneratorSettings.seaLevel(),
							noiseGeneratorSettings.disableMobGeneration(), noiseGeneratorSettings.aquifersEnabled(), noiseGeneratorSettings.oreVeinsEnabled(),
							noiseGeneratorSettings.useLegacyRandomSource());
						noiseGenerator.settings = new Holder.Direct(moddedNoiseGeneratorSettings);
					}
				}
			}

		}
	}

	private static SurfaceRules.RuleSource preliminarySurfaceRule(ResourceKey<Biome> biomeKey, BlockState groundBlock, BlockState undergroundBlock, BlockState underwaterBlock) {
		return SurfaceRules.ifTrue(SurfaceRules.isBiome(biomeKey),
			SurfaceRules.ifTrue(SurfaceRules.abovePreliminarySurface(),
				SurfaceRules.sequence(
					SurfaceRules.ifTrue(SurfaceRules.stoneDepthCheck(0, false, 0, CaveSurface.FLOOR),
						SurfaceRules.sequence(SurfaceRules.ifTrue(SurfaceRules.waterBlockCheck(-1, 0), SurfaceRules.state(groundBlock)),
							SurfaceRules.state(underwaterBlock))),
					SurfaceRules.ifTrue(SurfaceRules.stoneDepthCheck(0, true, 0, CaveSurface.FLOOR), SurfaceRules.state(undergroundBlock)))));
	}

Edited March 2, 20232 yr by RInventor7