docs: public I_CmsXmlSchemaType getSchemaType(String elementPath) {
  
          String path = CmsXmlUtils.removeXpath(elementPath);
          I_CmsXmlSchemaType result = m_elementTypes.get(path);
          if (result == null) {
              result = getSchemaTypeRecusive(path);
              if (result != null) {
                  m_elementTypes.put(path, result);
              } else {
                  m_elementTypes.put(path, NULL_SCHEMA_TYPE);
              }
          } else if (result == NULL_SCHEMA_TYPE) {
              result = null;
          }
          return result;
      }