code: function isNode(object) {
    return !!(object && (
      ((typeof Node === 'function' ? object instanceof Node : typeof object === 'object' &&
      typeof object.nodeType === 'number' &&
      typeof object.nodeName === 'string'))
    ));
  }
docs: Copyright 2013-2015, Facebook, Inc.
  All rights reserved.
  
  This source code is licensed under the BSD-style license found in the
  LICENSE file in the root directory of this source tree. An additional grant
  of patent rights can be found in the PATENTS file in the same directory.
  
  @providesModule isNode
  @typechecks
   
  @param {*} object The object to check.
  @return {boolean} Whether or not the object is a DOM node.