@Override
    public String toString() {
      return "[state " + getState() + ", hasWait " + hasWait() + ", activity "
        + TS_FORMAT.format(Instant.ofEpochMilli(getActivityTime())) + "]";
    }
The time to wait in an extremely unlikely case of a conflict with a running op. Only here so
that tests could override it and not wait.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/ServerNonceManager.java