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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 ReplaceOffer(self, offer_link, offer):
 """Replaces an offer and returns it. :param str offer_link: The link to the offer. :param dict offer: :return: The replaced Offer. :rtype: dict """

        CosmosClient.__ValidateResource(offer)
        path = base.GetPathFromLink(offer_link)
        offer_id = base.GetResourceIdOrFullNameFromLink(offer_link)
        return self.Replace(offer, path, 'offers', offer_id, None, None)