<node> <interface name="org.gtk.Notifications"> <method name="AddNotification"> <arg name="app_id" type="s" direction="in"/> <arg name="id" type="s" direction="in"/> <arg name="notification" type="a{sv}" direction="in"/> </method> <method name="RemoveNotification"> <arg name="app_id" type="s" direction="in"/> <arg name="id" type="s" direction="in"/> </method> </interface> </node>