docs: private void addToCreateElements(String elementName) {
          HashMap<String, String> elementAttributes = new HashMap<>();
  
          elementAttributes.put(XsdAbstractElement.NAME_TAG, elementName);
  
          if (!createdElements.containsKey(getCleanName(elementName))){
              createdElements.put(getCleanName(elementName), new XsdElement(null, elementAttributes));
          }
      }