Adds the region name to the widget at position pos in the hierarchy defined in path. See gtk.style_context.StyleContext.addRegion.
Region names must only contain lowercase letters and “-”, starting always with a lowercase letter.
position to modify, -1 for the path head
region name
flags affecting the region
Deprecated: The use of regions is deprecated.
Adds the region name to the widget at position pos in the hierarchy defined in path. See gtk.style_context.StyleContext.addRegion.
Region names must only contain lowercase letters and “-”, starting always with a lowercase letter.