docs: def _run(
          self,
          circuit: circuits.Circuit,
          param_resolver: study.ParamResolver,
          repetitions: int
      ) -> Dict[str, np.ndarray]:
          """Run a simulation, mimicking quantum hardware.
  
          Args:
              circuit: The circuit to simulate.
              param_resolver: Parameters to run with the program.
              repetitions: Number of times to repeat the run.
  
          Returns:
              A dictionary from measurement gate key to measurement
              results. Measurement results are stored in a 2-dimensional
              numpy array, the first dimension corresponding to the repetition
              and the second to the actual boolean measurement results (ordered
              by the qubits being measured.)
          """
          raise NotImplementedError()