MutterWindow exposes internal API types
The MutterWindow has gained a new property:
obj_props[PROP_SUSPEND_STATE] =
g_param_spec_enum ("suspend-state",
"Suspend state",
"The suspend state of the window",
META_TYPE_WINDOW_SUSPEND_STATE,
META_WINDOW_SUSPEND_STATE_SUSPENDED,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
The issue is that META_TYPE_WINDOW_SUSPEND_STATE
is part of the private API and thus this property has an empty type in the introspection.