public long startUnregisterInterest() {
    stats.incInt(unregisterInterestInProgressId, 1);
    sendStats.incInt(unregisterInterestSendInProgressId, 1);
    startClientOp();
    return getStatTime();
  }
Records that the specified unregisterInterest is starting
<p>
Note: for every call of this method the caller must also call
{@link #endUnregisterInterestSend} and {@link #endUnregisterInterest}.

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