docs: function (parentComponent, nextElement, container, callback) {
      !(parentComponent != null && ReactInstanceMap.has(parentComponent)) ? "development" !== 'production' ? invariant(false, 'parentComponent must be a valid React Component') : _prodInvariant('38') : void 0;
      return ReactMount._renderSubtreeIntoContainer(parentComponent, nextElement, container, callback);
    }