Reset the class hierarchy cache to factory default, thereby undoing any calls to add_class_hierarchy_cache() by the user.
add_class_hierarchy_cache()
reset_class_hierarchy_cache()
NULL
Other class hierarchy operations: add_class_hierarchy_cache, register_autoconvert_function, reset_autoconvert_register
add_class_hierarchy_cache
register_autoconvert_function
reset_autoconvert_register