798         default=None,  argument
841         default=None,  argument
879         default=None,  argument
899     def __init__(self, option_strings, dest, default=False, required=False, help=None):  argument
911     def __init__(self, option_strings, dest, default=True, required=False, help=None):  argument
929         default=None,  argument
969         default=None,  argument
992     def __init__(self, option_strings, dest, default=None, required=False, help=None):  argument
1008     def __init__(self, option_strings, dest=SUPPRESS, default=SUPPRESS, help=None):  argument
1024         self, option_strings, version=None, dest=SUPPRESS, default=SUPPRESS, help=None  argument
1231     def _registry_get(self, registry_name, value, default=None):  argument
1419     def _pop_action_class(self, kwargs, default=None):  argument