Method: Check if current activity has action.
Method: Get the verb of current activity.
Method: Echo current activity verb.
Method: Return avatar of activity user.
Method: Prefetch question, answer, comment and user data.
Method: Pre fetch question and answers and cache them.
Method: Prefetch actors of activities and cache them.
Method: Pre fetch comments of activities and cache them.
Method: Check if current activity have group.
Method: Start group.