docs: public String getNextAvailableNodeId(final String nodeId) {
  	    String result = nodeId;
  	    do {
  	        result = _primaryNodeIds.getNextNodeId(result);
  	        if(result != null && result.equals(nodeId)) {
  	            result = null;
  	        }
  	    } while(result != null && !isNodeAvailable(result));
  	    return result;
  	}