docs: function(internalInstance, rootID, transaction, context) {
      var markup = internalInstance.mountComponent(rootID, transaction, context);
      if ("production" !== process.env.NODE_ENV) {
        ReactElementValidator.checkAndWarnForMutatedProps(
          internalInstance._currentElement
        );
      }
      transaction.getReactMountReady().enqueue(attachRefs, internalInstance);
      return markup;
    }