def delete(self, doc):
        if doc.id is None:
            raise DatabaseException('Document does not have id')
        if doc.sid is None:
            try:
                rs = self.db.docs.remove({'id': doc.id}, safe=True)
                assert rs['n'] == 1
            except Exception as e:
                raise DatabaseException(e)
            return None
        doc.data = None
        return self.update(doc)
def draw(self, context):
        layout = self.layout

        split = layout.split()
        row = split.row()
        row.label("")
        row = split.row()
        row.label("Interaction:")

        text = bpy.path.display_name(context.window_manager.keyconfigs.active.name)
        if not text:
            text = "Blender (default)"
        row.menu("USERPREF_MT_appconfigs", text=text)