public ServerConnectionCollection addConnection(ClientProxyMembershipID proxyID,
      ServerConnection connection) {
    synchronized (proxyIdConnections) {
      ServerConnectionCollection collection = getProxyIdCollection(proxyID);
      collection.addConnection(connection);
      return collection;
    }
  }
Adds a <code>ServerConnection</code> to the client's processing threads

@param proxyID The membership id of the client to be updated
@param connection The thread processing client requests
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/ClientHealthMonitor.java