[glibmm/glibmm-2-60] Gio::NetworkManager: Add class documentation

[Kjell Ahlstedt <kjellahl src gnome org>]

commit a83743e96f33b2bd06e7b9b72e739708fc76fe09
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Tue Mar 19 09:23:37 2019 +0100

    Gio::NetworkManager: Add class documentation

 gio/src/networkmonitor.hg | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/gio/src/networkmonitor.hg b/gio/src/networkmonitor.hg
index c3d75c94..9c39588f 100644
--- a/gio/src/networkmonitor.hg
+++ b/gio/src/networkmonitor.hg
@@ -33,8 +33,14 @@ namespace Gio
 
 _WRAP_ENUM(NetworkConnectivity, GNetworkConnectivity)
 
-
-/** TODO
+/** Network status monitor.
+ *
+ * %Gio::NetworkMonitor provides an easy-to-use cross-platform API
+ * for monitoring network connectivity. On Linux, the available
+ * implementations are based on the kernel's netlink interface and
+ * on NetworkManager.
+ *
+ * There is also an implementation for use inside Flatpak sandboxes.
  *
  * @newin{2,44}
  */