code: protected CmsResource getResource(CmsUUID structureId) throws CmsException {
  
          if (m_cachedResources.containsKey(structureId)) {
              return m_cachedResources.get(structureId);
          }
          return m_cms.readResource(structureId);
      }
docs: Accesses a resource by structure id.<p>
  
  @param structureId the structure id of the resource
  @return the resource with the given structure id
  
  @throws CmsException if the resource couldn't be read