Function isValidElement

code/composition/public/app.js:1768–1772

(object)

    0xeac7;

  var isValidElement = function(object) {
    return typeof object === 'object' &&
      object !== null &&
      object.$$typeof === REACT_ELEMENT_TYPE;
  };

  // By explicitly using `prop-types` you are opting into new development behavior.
  // http://fb.me/prop-types-in-prod