Gets the partition resolver associated with the database link

        :param str database_link:
            Database self link or ID based link.

        :return:
            An instance of PartitionResolver.
        :rtype: object

def GetPartitionResolver(self, database_link):
        """Gets the partition resolver associated with the database link

        :param str database_link:
            Database self link or ID based link.

        :return:
            An instance of PartitionResolver.
        :rtype: object

        """
        if not database_link:
            raise ValueError("database_link is None or empty.")

        return self.partition_resolvers.get(base.TrimBeginningAndEndingSlashes(database_link))