code: public Observable<ApplicationInsightsComponentAPIKeyInner> getAsync(String resourceGroupName, String resourceName, String keyId) {
          return getWithServiceResponseAsync(resourceGroupName, resourceName, keyId).map(new Func1<ServiceResponse<ApplicationInsightsComponentAPIKeyInner>, ApplicationInsightsComponentAPIKeyInner>() {
              @Override
              public ApplicationInsightsComponentAPIKeyInner call(ServiceResponse<ApplicationInsightsComponentAPIKeyInner> response) {
                  return response.body();
              }
          });
      }
docs: Get the API Key for this key id.
  
  @param resourceGroupName The name of the resource group.
  @param resourceName The name of the Application Insights component resource.
  @param keyId The API Key ID. This is unique within a Application Insights component.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the ApplicationInsightsComponentAPIKeyInner object