This structure is used to provide the type system with the information required to initialize and destruct (finalize) a type's class and its instances.
The initialized structure is passed to the g_type_register_static function (or is copied into the provided
TypeInfo structure in the complete_type_info
). The type system will perform a deep copy of this structure, so its memory does not need to be persistent across invocation of
g_type_register_static.