public void setHAContainer(Map container) {
    haContainer = container;
  }
Use this method <B>only</B> when put operation on HARegionQueue is in progress. It'll always
return null otherwise.

@return an instance of <code>ClientUpdateMessage</code> implementation.
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/HAEventWrapper.java