code: public static boolean validateUniquePolymerIDs(HELM2Notation helm2notation) {
  		List<String> listPolymerIDs = helm2notation.getPolymerAndGroupingIDs();
  		Map<String, String> uniqueId = new HashMap<String, String>();
  		for (String polymerID : listPolymerIDs) {
  			uniqueId.put(polymerID, "");
  		}
  		if (listPolymerIDs.size() > uniqueId.size()) {
  			LOG.info("Polymer node IDs are not unique");
  			return false;
  		}
  
  		return true;
  	}
docs: method to check if all existent polymer ids are unique
  
  @param helm2notation
  HELM2Notation object
  @return true if all polymers are unique, false otherwise