code: public String getPropertyValue(String propertyName) {
          String[] propertyNames = new String[1];
          propertyNames[0] = propertyName;
  
          return getPropertyValue(propertyNames);
      }
docs: Searches over the group of {@code GUIProperties} for a property
  corresponding to the given name.
  
  @param propertyName
  property name to be found
  @return the first property found associated with a concatenation of the
  given names
  @throws MissingGUIPropertyException