docs: function(InjectedEventPluginOrder) {
      ("production" !== process.env.NODE_ENV ? invariant(
        !EventPluginOrder,
        'EventPluginRegistry: Cannot inject event plugin ordering more than ' +
        'once. You are likely trying to load more than one copy of React.'
      ) : invariant(!EventPluginOrder));
      // Clone the ordering so it cannot be dynamically mutated.
      EventPluginOrder = Array.prototype.slice.call(InjectedEventPluginOrder);
      recomputePluginOrdering();
    }