code: private static boolean hasModification(MonomerNotationUnitRNA monomerNotation) {
  		if (monomerNotation.getUnit().contains("[") || monomerNotation.getUnit().contains("(X)")
  				|| monomerNotation.getUnit().endsWith(")")) {
  			return true;
  		}
  		return false;
  	}
docs: method to check if the MonomerNotationUnitRNA contains modification
  
  @param monomerNotation
  MonomerNotationUnitRNA
  @return true, if the MonomerNotationUnitRNA contains modification, false
  otherwise