/**
  * this is meant to return a subset of metadata properties that is useful for determining fanart
  * locations
  *
  * @param mediaType
  * @param mediaObject
  * @return
  */
 private Map<String, String> getMetadata(MediaType mediaType, Object mediaObject) {
   if (mediaType == MediaType.TV) {
     Map<String, String> props = new HashMap<String, String>();
     for (String key : new String[] {FanartUtil.SEASON_NUMBER, FanartUtil.EPISODE_NUMBER}) {
       String v = SageFanartUtil.GetMediaFileMetadata(mediaObject, key);
       if (!SageFanartUtil.isEmpty(v)) {
         props.put(key, v);
       }
     }
     return props;
   }
   return null;
 }