@Override
  public CallRunner remove() {
    throw new UnsupportedOperationException(
      "This class doesn't support anything," + " but take() and offer() methods");
  }
@param callRunner to validate
@return true if this call needs to be skipped based on call timestamp and internal queue state
        (deemed overloaded).
hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/AdaptiveLifoCoDelCallQueue.java