@Override
  public synchronized String toString() {
    StringBuilder builder = new StringBuilder();
    builder.append("QuotaState(ts=" + getLastUpdate());
    if (isBypass()) {
      builder.append(" bypass");
    } else {
      if (globalLimiter != NoopQuotaLimiter.get()) {
        // builder.append(" global-limiter");
        builder.append(" " + globalLimiter);
      }
    }
    builder.append(')');
    return builder.toString();
  }
In-Memory state of table or namespace quotas
hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/QuotaState.java