code: public static Cluster getClusterScope(Config config, boolean create) throws PageException {
  	if (cluster == null && create) {
  	    cluster = ((ConfigImpl) config).createClusterScope();
  
  	}
  	return cluster;
      }
docs: Returns the current Cluster Scope, if there is no current Cluster Scope and create is true,
  returns a new Cluster Scope. If create is false and the request has no valid Cluster Scope, this
  method returns null.
  
  @param config
  @param create
  @return
  @throws PageException