@since: bbPress (r2888)
Description
bbp_is_topic_trash()

Is the topic trashed?

Source: bp-forums/topics/template.php:1244

bbp_update_topic_last_active_id()

Update the topic with the last active post ID

Source: bp-forums/topics/functions.php:2590

bbp_update_forum_topic_count_hidden()

Adjust the total hidden topic count of a forum (hidden includes trashed and spammed topics)

Source: bp-forums/forums/functions.php:1490