@Override
  public boolean isDestroyed() {
    if (isClosed()) {
      return true;
    }

    boolean isTraceEnabled = logger.isTraceEnabled();

    if (isDestroyed) {
      if (isTraceEnabled) {
        logger.trace("isDestroyed: true, this.isDestroyed: {}", getFullPath());
      }
      return true;
    }

    if (isTraceEnabled) {
      logger.trace("isDestroyed: false : {}", getFullPath());
    }
    return false;
  }
returns true if this region has been destroyed
geode-core/src/main/java/org/apache/geode/internal/cache/LocalRegion.java