code: protected List<CmsCategory> getResourceCategories() throws CmsException {
  
          if (m_resCats == null) {
              m_resCats = m_categoryService.readResourceCategories(getJsp().getCmsObject(), getParamResource());
          }
          return m_resCats;
      }
docs: Returns a list of a categories related to the current request resource.<p>
  
  @return a list of a categories related to the current request resource
  
  @throws CmsException if something goes wrong