Revision control
++ <!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
++ <node>
++ <interface name="org.freedesktop.Notifications">
++ <signal name="NotificationClosed">
++ <arg name="id" type="u" direction="out"/>
++ <arg name="reason" type="u" direction="out"/>
++ </signal>
++ <signal name="ActionInvoked">
++ <arg name="id" type="u" direction="out"/>
++ <arg name="action_key" type="s" direction="out"/>
++ </signal>
++ <method name="Notify">
++ <annotation name="org.qtproject.QtDBus.QtTypeName.In6" value="QVariantMap"/>
++ <arg type="u" direction="out"/>
++ <arg name="app_name" type="s" direction="in"/>
++ <arg name="replaces_id" type="u" direction="in"/>
++ <arg name="app_icon" type="s" direction="in"/>
++ <arg name="summary" type="s" direction="in"/>
++ <arg name="body" type="s" direction="in"/>
++ <arg name="actions" type="as" direction="in"/>
++ <arg name="hints" type="a{sv}" direction="in"/>
++ <arg name="timeout" type="i" direction="in"/>
++ </method>
++ <method name="CloseNotification">
++ <arg name="id" type="u" direction="in"/>
++ </method>
++ <method name="GetCapabilities">
++ <arg type="as" name="caps" direction="out"/>
++ </method>
++ <method name="GetServerInformation">
++ <arg type="s" name="name" direction="out"/>
++ <arg type="s" name="vendor" direction="out"/>
++ <arg type="s" name="version" direction="out"/>
++ <arg type="s" name="spec_version" direction="out"/>
++ </method>
++ </interface>
++ </node>