gtk-widget-class-set-template (gtype template)

gtype -- the g-type type ID of the widget class
template -- a string holding the gtk-builder XML

This should be called at class initialization time to specify the gtk-builder XML to be used to extend a widget.

For convenience, the gtk-widget-class-set-template-from-resource function is also provided.

Note that any class that installs templates must call the gtk-widget-init-template function in the instance initializer of the widget.