content: import React from 'react';
  import Typography from '@material-ui/core/Typography';
  import Box from '@material-ui/core/Box';
  
  export default function LineHeight() {
    return (
      <Typography component="div">
        <Box lineHeight="normal" m={1}>
          Normal height.
        </Box>
        <Box lineHeight={2} m={1}>
          line-height: 2
        </Box>
      </Typography>
    );
  }
  