code: private I_CmsResourceWrapper getResourceTypeWrapper(CmsResource res) {
  
          Iterator<I_CmsResourceWrapper> iter = getWrappers().iterator();
          while (iter.hasNext()) {
              I_CmsResourceWrapper wrapper = iter.next();
  
              if (wrapper.isWrappedResource(m_cms, res)) {
                  return wrapper;
              }
          }
  
          return null;
      }
docs: Try to find a resource type wrapper for the resource.<p>
  
  Takes all configured resource type wrappers and ask if one of them is responsible
  for that resource. The first in the list which feels responsible is returned.
  If no wrapper could be found null will be returned.<p>
  
  @see I_CmsResourceWrapper#isWrappedResource(CmsObject, CmsResource)
  
  @param res the resource to find a resource type wrapper for
  
  @return the found resource type wrapper for the resource or null if not found