A #GDBusConnection.
The unique bus name of the remote caller.
The object path that was registered with g_dbus_connection_register_subtree().
The D-Bus interface name that the method call or property access is for.
A node that is a child of object_path
(relative to object_path)
or %NULL for the root of the subtree.
Return location for user data to pass to functions in the returned #GDBusInterfaceVTable.
The type of the
dispatch
function in #GDBusSubtreeVTable.Subtrees are flat.
node,
if non-%NULL, is always exactly one segment of the object path (ie: it never contains a slash).