Same as https://github.com/facebook/react/issues/10103, but for the server renderer. You can look at implementation in https://github.com/facebook/react/pull/11168 and do something very similar in `ReactPartialRenderer.js`.
static childContextTypes = {
        foo: PropTypes.string,
        depth: PropTypes.number,
      };
      getChildContext() {
        return {
          foo: 'bar',
          depth: 0,
        };
      }
      render() {
        return <Child />;
      }
    }
    class Child extends React.Component {
      static contextTypes = {
        foo: PropTypes.string,
        depth: PropTypes.number,
      };
      static childContextTypes = {
        depth: PropTypes.number,
      };
      getChildContext() {