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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 runs(self, offset=0, limit=-1, properties=None):
 """Get a list of run descriptors associated with this expriment. Parameters offset : int, optional Starting offset for returned list items limit : int, optional Limit the number of items in the result properties : List(string) List of additional object properties to be included for items in the result Returns ------- List(scoserv.ModelRunDescriptor) List of model run descriptors """

        return get_run_listing(
            self.runs_url,
            offset=offset,
            limit=limit,
            properties=properties
        )