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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 get_resource_ids(self):
 """ Get resource ids as a list. :return: List of resource id:s or "unknown" """

        resids = []
        if self.dutinformations:
            for info in self.dutinformations:
                resids.append(info.resource_id)
            return resids
        return "unknown"