dde-application-manager/api/dbus/org.desktopspec.ObjectManager1.xml

<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN" "https://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
<node>
    <interface name="org.desktopspec.DBus.ObjectManager">
        <method name="GetManagedObjects">
            <arg name="objpath_interfaces_and_properties" type="a{oa{sa{sv}}}" direction="out" />
            <annotation name="org.qtproject.QtDBus.QtTypeName.Out0" value="ObjectMap"/>
        </method>

        <signal name="InterfacesAdded">
            <arg name="object_path" type="o" />
            <arg name="interfaces_and_properties" type="a{sa{sv}}" />
            <annotation name="org.qtproject.QtDBus.QtTypeName.Out1" value="ObjectInterfaceMap"/>
        </signal>

        <signal name="InterfacesRemoved">
            <arg name="object_path" type="o" />
            <arg name="interfaces" type="as" />
        </signal>
    </interface>
</node>