code: function componentWillMount() {
    // Call this.constructor.gDSFP to support sub-classes.
    var state = this.constructor.getDerivedStateFromProps(this.props, this.state);
    if (state !== null && state !== undefined) {
      this.setState(state);
    }
  }
docs: Copyright (c) 2013-present, Facebook, Inc.
  
  This source code is licensed under the MIT license found in the
  LICENSE file in the root directory of this source tree.