Add existing content

Group node (Page): Add existing content item of type Page to the group.
Group node (Dear colleague letter): Add existing content item of type Dear colleague letter to the group.
Group node (Updates): Add existing content item of type Updates to the group.
Group node (Alert (in-page)): Add existing content item of type Alert (in-page) to the group.
Group node (Menu Page): Add existing content item of type Menu Page to the group.
Group node (News): Add existing content item of type News to the group.
Group node (Program): Add existing content item of type Program to the group.
Group node (Quote): Add existing content item of type Quote to the group.