Method: Prefetch question, answer, comment and user data.

Method: Prepare and fetch notifications from database.

Method: Get activity by activity_id.

Method: Delete single and multiple activity from database.

Action Hook: Hook triggered right after an AnsPress activity is deleted from database.

Method: Initialize the activity class.

Class: The activity query.

Method: Insert activity data into the database. `$q_id` argument cannot be left blank as it is required.

Method: Check if activity action exists.

Method: Return a single registered action of AnsPress.