title: Changing the name of a group (ABGroup) in iOS address book
body: <p>I would like to add the ability to change the name of a group in the address book. However I can't seem to find an existing method to do this.</p>
  
  <p>Does anyone know if such a method exists? Or is my only option to copy the members of the group, add them to a new group with the new name, and delete the old group?</p>