[gnome-builder] Ide.overrides: add NotSupportedError()

[Christian Hergert <chergert src gnome org>]

commit 350b3e1262f7ba56c20984d8b8a0bbcde2a67ae0
Author: Christian Hergert <chergert redhat com>
Date:   Sat Oct 29 20:42:10 2016 -0700

    Ide.overrides: add NotSupportedError()
    
    This is a helper to create a NotSupportedError() which is handy since we
    use that error code to detect unsupported features.

 libide/Ide.py |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/libide/Ide.py b/libide/Ide.py
index 5c4e2dd..df6faa2 100644
--- a/libide/Ide.py
+++ b/libide/Ide.py
@@ -157,5 +157,9 @@ class DBusService:
         error = GLib.Error.new_literal(GLib.io_channel_error_quark(), 1, 'Not implemented yet')
         return False
 
+def NotSupportedError():
+    return GLib.Error.new_literal(Gio.io_error_quark(), 'not supported', Gio.IOErrorEnum.NOT_SUPPORTED)
+
+Ide.NotSupportedError = NotSupportedError
 Ide.DBusService = DBusService
 Ide.DBusMethod = DBusMethod