content: import React, { Component } from 'react';
  
  class Icon extends Component {
  
    propTypes: {
      url: PropTypes.string,
      alt: PropTypes.string,
      height: PropTypes.number,
      width: PropTypes.number
    }
  
    render() {
      return (
          <div className="Icon">
            <span>
              Icon
              <img 
                src={this.props.url} 
                alt={this.props.alt}
                height={this.props.height}
                width={this.props.width}
              />
            </span>
          </div>
      );
    }
  }
  
  export default Icon;
  