package net.minecraft.world.level.levelgen.material; import javax.annotation.Nullable; import net.minecraft.world.level.block.state.BlockState; import net.minecraft.world.level.levelgen.NoiseChunk; public interface WorldGenMaterialRule { @Nullable BlockState apply(NoiseChunk p_191553_, int p_191554_, int p_191555_, int p_191556_); }