WireMock

Yes, but at the moment you need to use the core WireMock DSL. We haven't added delays to the extension DSL yet.

Would that look something like this?

```  this.wireMock.register(
      <http://WireMock.post|WireMock.post>(grpcUrlPath(LocationsGrpc.SERVICE_NAME, "GetRandomLocation"))
        .willReturn(
          message(DEFAULT_GRPC_LOCATION).build()
            .withFixedDelay(3_000)
        )
    );```

if so, it doesn’t seem to work. It doesn’t respect the delay (it does serve the response immediately)

Yes, apologies - the gRPC extension has the effect of skipping the delay code so it needs to be factored out into a library class in WireMock core, then used in the extension.