docs: public GetClusterResponse getCluster(GetClusterRequest request) {
          checkNotNull(request, "request should not be null.");
          checkStringNotEmpty(request.getClusterId(), "The parameter clusterId should not be null or empty string.");
  
          InternalRequest internalRequest = this.createRequest(
                  request, HttpMethodName.GET, CLUSTER, request.getClusterId());
  
          return this.invokeHttpClient(internalRequest, GetClusterResponse.class);
      }