Method grow

src/main/java/net/minecraft/block/BlockTallGrass.java:133–146

(World worldIn, Random rand, BlockPos pos, IBlockState state)

    }

    public void grow(World worldIn, Random rand, BlockPos pos, IBlockState state)
    {
        BlockDoublePlant.EnumPlantType blockdoubleplant$enumplanttype = BlockDoublePlant.EnumPlantType.GRASS;

        if (state.getValue(TYPE) == BlockTallGrass.EnumType.FERN)
        {
            blockdoubleplant$enumplanttype = BlockDoublePlant.EnumPlantType.FERN;
        }

        if (Blocks.double_plant.canPlaceBlockAt(worldIn, pos))
        {
            Blocks.double_plant.placeAt(worldIn, pos, blockdoubleplant$enumplanttype, 2);
        }
    }

    /**
     * Convert the given metadata into a BlockState for this Block