Builder setStartupCompletionAction(Runnable startupCompletionAction) {
      this.startupCompletionAction = startupCompletionAction;
      return this;
    }
Sets the action to run when the server is online.

@param startupCompletionAction the action to run
@return this builder
geode-core/src/main/java/org/apache/geode/distributed/ServerLauncher.java