public static StartupStatusListener getStartupListener() {
    ProcessLauncherContext context = get();
    if (context == null) {
      return null;
    }

    return context.startupListener();
  }
Returns the gemfire properties to be used if none of the specified properties are defined by
any other mechanism. This will only override default values. If a property is defined by System
property, API, or within gemfire.properties then the contingent value will be ignored.

@return the contingent gemfire properties values to be used as an alternative default value
geode-core/src/main/java/org/apache/geode/internal/process/ProcessLauncherContext.java