code: public List<CmsJspNavElement> getSiteNavigation(String folder, int endLevel) {
  
          return getSiteNavigation(folder, Visibility.navigation, endLevel);
      }
docs: This method builds a complete navigation tree with entries of all branches
  from the specified folder.<p>
  
  @param folder folder the root folder of the navigation tree
  @param endLevel the end level of the navigation
  
  @return list of navigation elements, in depth first order