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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_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)