Because in function do_add of ImageController, "path_root in image.extra_properties" is true and raise an ERROR.
And in function __setitem__ of ExtraPropertiesProxy, "self.__getitem__(key) is not None" is false and then do nothing.
BTW, I perfer to change this perperties both in add and replace op because none is as not set.
Because in function do_add of ImageController, "path_root in image.extra_ properties" is true and raise an ERROR. Proxy, "self._ _getitem_ _(key) is not None" is false and then do nothing.
And in function __setitem__ of ExtraProperties
BTW, I perfer to change this perperties both in add and replace op because none is as not set.