private String startServerCommand(String serverName, int serverPort, Path serviceJarPath,
      Path functionsJarPath) {
    return String.join(" ",
        "start server",
        "--name=" + serverName,
        "--groups=" + serverName,
        "--dir=" + rootFolder.resolve(serverName),
        "--server-port=" + serverPort,
        "--locators=localhost[" + locatorPort + "]",
        "--classpath=" + serviceJarPath + pathSeparatorChar + functionsJarPath);
  }
Acceptance tests for function executions timer for functions with hasResult=false
geode-assembly/src/acceptanceTest/java/org/apache/geode/metrics/function/executions/FunctionExecutionsTimerNoResultTest.java