@Deprecated
  public long getWriteBufferPeriodicFlushTimerTickMs() {
    return writeBufferPeriodicFlushTimerTickMs;
  }
@deprecated Since 3.0.0, will be removed in 4.0.0. We use a common timer in the whole client
            implementation so you can not set it any more.
hbase-client/src/main/java/org/apache/hadoop/hbase/client/BufferedMutatorParams.java