content: import React from 'react';
  import PropTypes from 'prop-types';
  import clsx from 'clsx';
  import RadioButtonUncheckedIcon from '../internal/svg-icons/RadioButtonUnchecked';
  import RadioButtonCheckedIcon from '../internal/svg-icons/RadioButtonChecked';
  import withStyles from '../styles/withStyles';
  export const styles = theme => ({
    root: {
      position: 'relative',
      display: 'flex',
      '&$checked $layer': {
        transform: 'scale(1)',
        transition: theme.transitions.create('transform', {
          easing: theme.transitions.easing.easeOut,
          duration: theme.transitions.duration.shortest
        })
      }
    },
    layer: {
      left: 0,
      position: 'absolute',
      transform: 'scale(0)',
      transition: theme.transitions.create('transform', {
        easing: theme.transitions.easing.easeIn,
        duration: theme.transitions.duration.shortest
      })
    },
    checked: {}
  });
  /**
   * @ignore - internal component.
   */
  
  function RadioButtonIcon(props) {
    const {
      checked,
      classes,
      fontSize
    } = props;
    return React.createElement("div", {
      className: clsx(classes.root, checked && classes.checked)
    }, React.createElement(RadioButtonUncheckedIcon, {
      fontSize: fontSize
    }), React.createElement(RadioButtonCheckedIcon, {
      fontSize: fontSize,
      className: classes.layer
    }));
  }
  
  process.env.NODE_ENV !== "production" ? RadioButtonIcon.propTypes = {
    /**
     * If `true`, the component is checked.
     */
    checked: PropTypes.bool,
  
    /**
     * Override or extend the styles applied to the component.
     * See [CSS API](#css) below for more details.
     */
    classes: PropTypes.object.isRequired,
  
    /**
     * The size of the radio.
     * `small` is equivalent to the dense radio styling.
     */
    fontSize: PropTypes.oneOf(['small', 'default'])
  } : void 0;
  export default withStyles(styles, {
    name: 'PrivateRadioButtonIcon'
  })(RadioButtonIcon);