Emits a child-notify signal for the [child property][child-properties] specified by pspec on the child.
This is an analogue of g_object_notify_by_pspec() for child properties.
the child widget
the gobject.ParamSpec of a child property instealled on the class of container
3.18
Emits a child-notify signal for the [child property][child-properties] specified by pspec on the child.
This is an analogue of g_object_notify_by_pspec() for child properties.