code: public Observable<JobExecutionInner> createAsync(String resourceGroupName, String serverName, String jobAgentName, String jobName) {
          return createWithServiceResponseAsync(resourceGroupName, serverName, jobAgentName, jobName).map(new Func1<ServiceResponse<JobExecutionInner>, JobExecutionInner>() {
              @Override
              public JobExecutionInner call(ServiceResponse<JobExecutionInner> response) {
                  return response.body();
              }
          });
      }
docs: Starts an elastic job execution.
  
  @param resourceGroupName The name of the resource group that contains the resource. You can obtain this value from the Azure Resource Manager API or the portal.
  @param serverName The name of the server.
  @param jobAgentName The name of the job agent.
  @param jobName The name of the job to get.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable for the request