How to use the @cometchat-pro/chat.CometChat.GroupsRequestBuilder function in @cometchat-pro/chat

fetchGroupsWithSearchKey=(key)=>{
    let groupsRequest = new CometChat.GroupsRequestBuilder().setLimit(100).setSearchKeyWord(key).build();

    groupsRequest.fetchNext().then(
      groupList => {              
        this.setState({searchMode:true,searchData:groupList});
      },
      error => {
        console.log("Groups list fetching failed with error", error);
      }
    );
  }

static setGroupRequestBuilder(limit){
    CCManager.groupRequest = new CometChat.GroupsRequestBuilder().setLimit(limit).build();
  }