public static ServerLauncher getInstance() {
    return INSTANCE.get();
  }
Gets the instance of the ServerLauncher used to launch the Geode Cache Server, or null if
this VM does not have an instance of ServerLauncher indicating no Geode Cache Server is
running.

@return the instance of ServerLauncher used to launcher a Geode Cache Server in this VM.
geode-core/src/main/java/org/apache/geode/distributed/ServerLauncher.java