BP_Akismet::get_activity_history( int $activity_id )

	public function get_activity_history( $activity_id = 0 ) {
		$history = bp_activity_get_meta( $activity_id, '_bp_akismet_history' );
		if ( $history === false )
			$history = array();

		// Sort it by the time recorded.
		usort( $history, 'akismet_cmp_time' );

		return $history;
	}