How to use the execnet.gateway_base._Serializer.save function in execnet

def dumps_internal(obj):
    return _Serializer().save(obj)

def dumps(obj):
    """ return a serialized bytestring of the given obj.

    The obj and all contained objects must be of a builtin
    python type (so nested dicts, sets, etc. are all ok but
    not user-level instances).
    """
    return _Serializer().save(obj, versioned=True)

def dump(byteio, obj):
    """ write a serialized bytestring of the given obj to the given stream. """
    _Serializer(write=byteio.write).save(obj, versioned=True)