Filter Hook: Filter question description before saving.
Filter Hook: Can be used to modify `$args` before updating answer
Filter Hook: Can be used to modify args before inserting answer
Filter Hook: Filter comment content before inserting to DB.
Action Hook: No description
Action Hook: Action triggered before processing question form.
Method: Process question form submission.
Action Hook: Action triggered before processing answer form.
Action Hook: Action triggered before processing comment form.
Method: Process question form submission.