code: public Observable<Page<JobExecutionInner>> listByAgentAsync(final String resourceGroupName, final String serverName, final String jobAgentName) {
          return listByAgentWithServiceResponseAsync(resourceGroupName, serverName, jobAgentName)
              .map(new Func1<ServiceResponse<Page<JobExecutionInner>>, Page<JobExecutionInner>>() {
                  @Override
                  public Page<JobExecutionInner> call(ServiceResponse<Page<JobExecutionInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Lists all executions in a job agent.
  
  @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.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;JobExecutionInner&gt; object