bp_activity_do_heartbeat()

function bp_activity_do_heartbeat() {
	$retval = false;

	if ( bp_is_activity_heartbeat_active() && ( bp_is_activity_directory() || bp_is_group_activity() ) ) {
		$retval = true;
	}

	/**
	 * Filters whether the heartbeat feature in the activity feed should be active.
	 *
	 * @since BuddyPress 2.8.0
	 *
	 * @param bool $retval Whether or not activity heartbeat is active.
	 */
	return (bool) apply_filters( 'bp_activity_do_heartbeat', $retval );
}