Method: Return singleton instance of this class.

Method: Control the output of [question] shortcode

Action Hook: Action is fired before loading AnsPress body.

Action Hook: Hook triggered right after inserting a subscriber.

Function: Get a subscriber.

Function: Get a subscribers count of a reference by specific event or without it.

Function: Get subscribers. Total subscribers count will be returned if no argument is passed.

Function: Delete subscribers by event, ref_id and user_id.

Action Hook: Action triggered right after deleting subscribers.

Function: Check if user is subscribed to a reference event.