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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def check_serializable(cls):
 """Throws an exception if Ray cannot serialize this class efficiently. Args: cls (type):
 The class to be serialized. Raises: Exception: An exception is raised if Ray cannot serialize this class efficiently. """

    if is_named_tuple(cls):
        # This case works.
        return
    if not hasattr(cls, "__new__"):
        print("The class {} does not have a '__new__' attribute and is "
              "probably an old-stye class. Please make it a new-style class "
              "by inheriting from 'object'.")
        raise RayNotDictionarySerializable("The class {} does not have a "
                                           "'__new__' attribute and is "
                                           "probably an old-style class. We "
                                           "do not support this. Please make "
                                           "it a new-style class by "
                                           "inheriting from 'object'."
                                           .format(cls))
    try:
        obj = cls.__new__(cls)
    except Exception:
        raise RayNotDictionarySerializable("The class {} has overridden "
                                           "'__new__', so Ray may not be able "
                                           "to serialize it efficiently."
                                           .format(cls))
    if not hasattr(obj, "__dict__"):
        raise RayNotDictionarySerializable("Objects of the class {} do not "
                                           "have a '__dict__' attribute, so "
                                           "Ray cannot serialize it "
                                           "efficiently.".format(cls))
    if hasattr(obj, "__slots__"):
        raise RayNotDictionarySerializable("The class {} uses '__slots__', so "
                                           "Ray may not be able to serialize "
                                           "it efficiently.".format(cls))