* @unregistered: If this is set, the type is not registered with GType.
* @alignment: The byte boundary that the struct is aligned to in memory
* @is_gtype_struct: Whether this structure is the class or interface layout for a GObject
* @unregistered: If this is set, the type is not registered with GType.
* @alignment: The byte boundary that the struct is aligned to in memory
* @is_gtype_struct: Whether this structure is the class or interface layout for a GObject