code: @Override
      public int coalesceKamEdges(KamInfo info) {
          try {
              KAMUpdateDao updateDao = kamUpdateDao(info);
              return updateDao.coalesceKamEdges();
          } catch (SQLException e) {
              final String msg = "error coalescing edges";
              throw new KAMStoreException(msg, e);
          }
      }
docs: {@inheritDoc}