code: public Observable<String> getContentAsync(String resourceGroupName, String automationAccountName, String configurationName) {
          return getContentWithServiceResponseAsync(resourceGroupName, automationAccountName, configurationName).map(new Func1<ServiceResponse<String>, String>() {
              @Override
              public String call(ServiceResponse<String> response) {
                  return response.body();
              }
          });
      }
docs: Retrieve the configuration script identified by configuration name.
  
  @param resourceGroupName Name of an Azure Resource group.
  @param automationAccountName The name of the automation account.
  @param configurationName The configuration name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the String object