code: protected CmsSubscriptionFilter getSubscriptionFilter(CmsObject cms, String param) throws CmsException {
  
          return getSubscriptionFilter(cms, getParameters(param));
      }
docs: Returns the configured subscription filter to use.<p>
  
  @param cms the current users context
  @param param an optional collector parameter
  
  @return the configured subscription filter to use
  
  @throws CmsException if something goes wrong