Method: Return all registered actions of AnsPress.
Method: Return a single registered action of AnsPress.
Method: Check if activity action exists.
Method: Insert activity data into the database. `$q_id` argument cannot be left blank as it is required.
Method: Creates or returns an instance of this class.
Method: Constructor for the database class to inject the table name
Method: Register all hooks of activities.
Method: Callback for `before_delete_post`.
Method: Callback for `delete_comment`.
Method: Callback for loading more activities.
