public long startContainsKey() {
    stats.incInt(containsKeyInProgressId, 1);
    sendStats.incInt(containsKeySendInProgressId, 1);
    startClientOp();
    return getStatTime();
  }
Records that the specified containsKey is starting
<p>
Note: for every call of this method the caller must also call {@link #endContainsKeySend} and
{@link #endContainsKey}.

@return the start time of this containsKey
geode-core/src/main/java/org/apache/geode/cache/client/internal/ConnectionStats.java