public function setup_nav( $main_nav = array(), $sub_nav = array() ) {

		// Determine user to use.
		if ( bp_displayed_user_domain() ) {
			$user_domain = bp_displayed_user_domain();
		} elseif ( bp_loggedin_user_domain() ) {
			$user_domain = bp_loggedin_user_domain();
		} else {
			return;
		}

		$access             = bp_core_can_edit_settings();
		$slug               = bp_get_notifications_slug();
		$notifications_link = trailingslashit( $user_domain . $slug );

		// Only grab count if we're on a user page and current user has access.
		if ( bp_is_user() && bp_user_has_access() ) {
			$count    = bp_notifications_get_unread_notification_count( bp_displayed_user_id() );
			$class    = ( 0 === $count ) ? 'no-count' : 'count';
			$nav_name = sprintf(
				/* translators: %s: Unread notification count for the current user */
				_x( 'Notifications %s', 'Profile screen nav', 'buddypress' ),
				sprintf(
					'<span class="%s">%s</span>',
					esc_attr( $class ),
					bp_core_number_format( $count )
				)
			);
		} else {
			$nav_name = _x( 'Notifications', 'Profile screen nav', 'buddypress' );
		}

		// Add 'Notifications' to the main navigation.
		$main_nav = array(
			'name'                    => $nav_name,
			'slug'                    => $slug,
			'position'                => 30,
			'show_for_displayed_user' => $access,
			'screen_function'         => 'bp_notifications_screen_unread',
			'default_subnav_slug'     => 'unread',
			'item_css_id'             => $this->id,
		);

		// Add the subnav items to the notifications nav item.
		$sub_nav[] = array(
			'name'            => _x( 'Unread', 'Notification screen nav', 'buddypress' ),
			'slug'            => 'unread',
			'parent_url'      => $notifications_link,
			'parent_slug'     => $slug,
			'screen_function' => 'bp_notifications_screen_unread',
			'position'        => 10,
			'item_css_id'     => 'notifications-my-notifications',
			'user_has_access' => $access,
		);

		$sub_nav[] = array(
			'name'            => _x( 'Read', 'Notification screen nav', 'buddypress' ),
			'slug'            => 'read',
			'parent_url'      => $notifications_link,
			'parent_slug'     => $slug,
			'screen_function' => 'bp_notifications_screen_read',
			'position'        => 20,
			'user_has_access' => $access,
		);

		parent::setup_nav( $main_nav, $sub_nav );
	}