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    Create a class that can be passed into `attr.ib`'s ``eq``, ``order``, and
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    :param Optional[callable] eq: `callable` used to evaluate equality
        of two objects.
    :param Optional[callable] lt: `callable` used to evaluate whether
        one object is less than another object.
    :param Optional[callable] le: `callable` used to evaluate whether
        one object is less than or equal to another object.
    :param Optional[callable] gt: `callable` used to evaluate whether
        one object is greater than another object.
    :param Optional[callable] ge: `callable` used to evaluate whether
        one object is greater than or equal to another object.

    :param bool require_same_type: When `True`, equality and ordering methods
        will return `NotImplemented` if objects are not of the same type.

    :param Optional[str] class_name: Name of class. Defaults to 'Comparable'.

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