[gnome-music/wip/jfelder/songwidget-listboxrow: 7/10] playlistswidget: Initial static type annotations support

[Jean Felder <jfelder src gnome org>]

commit b8e11a949fd0379f1ee4cf5046797961a3f58efa
Author: Jean Felder <jfelder src gnome org>
Date:   Sat May 8 17:38:55 2021 +0200

    playlistswidget: Initial static type annotations support

 gnomemusic/widgets/playlistswidget.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
---
diff --git a/gnomemusic/widgets/playlistswidget.py b/gnomemusic/widgets/playlistswidget.py
index 00f9fbcd2..7f76122b6 100644
--- a/gnomemusic/widgets/playlistswidget.py
+++ b/gnomemusic/widgets/playlistswidget.py
@@ -22,6 +22,9 @@
 # code, but you are not obligated to do so.  If you do not wish to do so,
 # delete this exception statement from your version.
 
+from __future__ import annotations
+import typing
+
 from gi.repository import Gdk, GObject, Gtk
 
 from gnomemusic.widgets.notificationspopup import PlaylistNotification
@@ -29,6 +32,9 @@ from gnomemusic.widgets.playlistcontextmenu import PlaylistContextMenu
 from gnomemusic.widgets.playlistcontrols import PlaylistControls  # noqa: F401
 from gnomemusic.widgets.playlistdialog import PlaylistDialog
 from gnomemusic.widgets.songwidget import SongWidget
+if typing.TYPE_CHECKING:
+    from gnomemusic.application import Application
+    from gnomemusic.view.playlistsview import PlaylistsView
 
 
 @Gtk.Template(resource_path="/org/gnome/Music/ui/PlaylistsWidget.ui")
@@ -41,7 +47,9 @@ class PlaylistsWidget(Gtk.Box):
     _songs_list = Gtk.Template.Child()
     _songs_list_ctrlr = Gtk.Template.Child()
 
-    def __init__(self, application, playlists_view):
+    def __init__(
+            self, application: Application,
+            playlists_view: PlaylistsView) -> None:
         """Initialize the PlaylistsWidget.
 
         :param Application application: The application object