text: import React, { PropTypes } from 'react'
  
  class TestChildren extends React.Component {
    componentDidMount(){
      console.log(this.context);
    }
    render () {
     return(
       <div>
       孙子辈
       </div>
     )
    }
  }
  
  TestChildren.contextTypes = {
    color: React.PropTypes.string
  };
  export default TestChildren;
  