code: private void buildDawg(Keyset keyset, DawgBuilder dawgBuilder)
      {
          dawgBuilder.init();
          for (int i = 0; i < keyset.numKeys(); ++i)
          {
              dawgBuilder.insert(keyset.getKey(i), keyset.getValue(i));
          }
          dawgBuilder.finish();
      }
docs: 构建
  @param keyset
  @param dawgBuilder