React-native: [React ref]如何获取listView的sectionHeader视图的ref

  render() {
    <ListView
      ref={'listView'}
      dataSource={this.state.dataSource}
      renderRow={this.renderRow}
      renderSectionHeader={this.renderSectionHeader}
    />
  },

  renderSectionHeader() {
    <DXTextMenu
      ref={'textMenu'}
      style={{height: TEXT_MENU_HEIGHT}}
    />
  },

  componentDidMount() {
    // Got it
    const list = this.refs['listView'];

    // Not found
    const textMenu = this.refs['textMenu'];
  },

如代码所示，我可以获取 listView ref 但不能获取 listView 的 header 的 ref，我该如何获取它？