content: import React from 'react';
  import PropTypes from 'prop-types';
  import { withStyles } from '@material-ui/core/styles';
  import Button from '@material-ui/core/Button';
  
  const styles = {
    root: {
      background: 'linear-gradient(45deg, #FE6B8B 30%, #FF8E53 90%)',
      borderRadius: 3,
      border: 0,
      color: 'white',
      height: 48,
      padding: '0 30px',
      boxShadow: '0 3px 5px 2px rgba(255, 105, 135, .3)',
    },
    label: {
      textTransform: 'capitalize',
    },
  };
  
  function ClassesNesting(props) {
    const { classes } = props;
  
    return (
      <Button
        classes={{
          root: classes.root, // class name, e.g. `classes-nesting-root-x`
          label: classes.label, // class name, e.g. `classes-nesting-label-x`
        }}
      >
        classes nesting
      </Button>
    );
  }
  
  ClassesNesting.propTypes = {
    classes: PropTypes.object.isRequired,
  };
  
  export default withStyles(styles)(ClassesNesting);
  