docs: function(nestedChildren, transaction, context) {
        var children = ReactChildReconciler.instantiateChildren(
          nestedChildren, transaction, context
        );
        this._renderedChildren = children;
        var mountImages = [];
        var index = 0;
        for (var name in children) {
          if (children.hasOwnProperty(name)) {
            var child = children[name];
            // Inlined for performance, see `ReactInstanceHandles.createReactID`.
            var rootID = this._rootNodeID + name;
            var mountImage = ReactReconciler.mountComponent(
              child,
              rootID,
              transaction,
              context
            );
            child._mountIndex = index;
            mountImages.push(mountImage);
            index++;
          }
        }
        return mountImages;
      }