public static int AddSeed(BaseSimilarityContext seed)
 {
     lock (seeds) {
         seeds[seed_index] = seed;
         return(seed_index++);
     }
 }
 public static int AddSeed(BaseSimilarityContext seed)
 {
     lock (seeds) {
         seeds[seed_index] = seed;
         return seed_index++;
     }
 }