chore(Window): Add session / server instance typings

Author: tony

libtmux/window.py

@@ -18,6 +18,10 @@
 )
 from .pane import Pane
 
+if t.TYPE_CHECKING:
+    from .server import Server
+    from .session import Session
+
 logger = logging.getLogger(__name__)
 
 
@@ -45,12 +49,12 @@ class Window(TmuxMappingObject, TmuxRelationalObject):
     child_id_attribute = "pane_id"
     #: namespace used :class:`~libtmux.common.TmuxMappingObject`
     formatter_prefix = "window_"
+    #: :class:`libtmux.server.Server` window is linked to
+    server: "Server"
+    #: :class:`libtmux.session.Session` window is linked to
+    session: "Session"
 
-    def __init__(self, session=None, **kwargs):
-
-        if not session:
-            raise ValueError("Window requires a Session, session=Session")
-
+    def __init__(self, session: "Session", **kwargs):
         self.session = session
         self.server = self.session.server