code: def get_performance_signatures(self, project, **params):
          '''
          Gets a set of performance signatures associated with a project and time range
          '''
          results = self._get_json(self.PERFORMANCE_SIGNATURES_ENDPOINT, project, **params)
          return PerformanceSignatureCollection(resultsf get_performance_signatures(self, project, **params):
          '''
          Gets a set of performance signatures associated with a project and time range
          '''
          results = self._get_json(self.PERFORMANCE_SIGNATURES_ENDPOINT, project, **params)
          return PerformanceSignatureCollection(results)
docs: Gets a set of performance signatures associated with a project and time range