def METHOD_NAME(self, hgps):
    """Set api client to be the fake runtime client."""
    if not self._fake_runtime_client:
        if not self._backend_specs:
            self._backend_specs = [
                FakeApiBackendSpecs(backend_name=self.DEFAULT_COMMON_BACKEND, hgps=hgps)
            ]
            for idx, hgp in enumerate(hgps):
                self._backend_specs.append(
                    FakeApiBackendSpecs(
                        backend_name=self.DEFAULT_UNIQUE_BACKEND_PREFIX + str(idx),
                        hgps=[hgp],
                    )
                )
        self._fake_runtime_client = BaseFakeRuntimeClient(
            backend_specs=self._backend_specs, channel="ibm_quantum"
        )
    # Set fake runtime clients
    self._api_client = self._fake_runtime_client