<?xml version="1.0" encoding="UTF-8"?> <interface> <requires lib="gtk+" version="3.0"/> <object class="GtkWindow" id="window1"> <property name="decorated">0</property> <child> <object class="GtkLabel" id="label1"> <property name="label">abc</property> <signal name="map" handler="reftest:set_letter_spacing" swapped="no"/> </object> </child> </object> </interface>