public static void invokeInEveryVM(String name, final SerializableRunnableIF runnable) {
    for (int hostIndex = 0; hostIndex < Host.getHostCount(); hostIndex++) {
      Host host = Host.getHost(hostIndex);

      for (VM vm : host.getAllVMs()) {
        if (name != null) {
          vm.invoke(name, runnable);
        } else {
          vm.invoke(runnable);
        }
      }
    }
  }
Invokes a <code>SerializableRunnable</code> in every VM that DUnit knows about.
<p>
Note: this does NOT include the controller VM or locator VM.

@param runnable the <code>SerializableRunnable</code> to invoke
@see VM#invoke(SerializableRunnableIF)
geode-dunit/src/main/java/org/apache/geode/test/dunit/Invoke.java