code: public List<MetricsResultsItem> getMultiple(String appId, List<MetricsPostBodySchema> body) {
          return getMultipleWithServiceResponseAsync(appId, body).toBlocking().single().body();
      }
docs: Retrieve metric data.
  Gets metric values for multiple metrics.
  
  @param appId ID of the application. This is Application ID from the API Access settings blade in the Azure portal.
  @param body The batched metrics query.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws ErrorResponseException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the List&lt;MetricsResultsItem&gt; object if successful.