content: import React from 'react';
  import { makeStyles } from '@material-ui/core/styles';
  import { green } from '@material-ui/core/colors';
  import Icon from '@material-ui/core/Icon';
  
  const useStyles = makeStyles((theme) => ({
    root: {
      '& > span': {
        margin: theme.spacing(2),
      },
    },
  }));
  
  export default function Icons() {
    const classes = useStyles();
  
    return (
      <div className={classes.root}>
        <Icon>add_circle</Icon>
        <Icon color="primary">add_circle</Icon>
        <Icon color="secondary">add_circle</Icon>
        <Icon style={{ color: green[500] }}>add_circle</Icon>
        <Icon fontSize="small">add_circle</Icon>
        <Icon style={{ fontSize: 30 }}>add_circle</Icon>
      </div>
    );
  }
  