Function: Remove friendship activity item when a friendship is deleted.

Function: Deletes friendship activity items when a user is deleted.

Function: Format ‘friendship_accepted’ activity actions.

Function: Format ‘friendship_created’ activity actions.

Function: Fetch data related to friended users at the beginning of an activity loop.

Function: Set up activity arguments for use with the ‘friends’ scope.

Function: Set up activity arguments for use with the ‘just-me’ scope.

Function: Add activity stream items when one members accepts another members request for virtual friendship.