docs: public GetInstanceResponse getInstance(GetInstanceRequest request) {
          checkNotNull(request, "request should not be null.");
          checkNotNull(request.getInstanceId(), "request instanceId should not be null.");
          InternalRequest internalRequest = this.createRequest(
                  request, HttpMethodName.GET, INSTANCE_PREFIX, request.getInstanceId());
          return this.invokeHttpClient(internalRequest, GetInstanceResponse.class);
      }