code: public String dirtyString()
      {
          StringBuilder sb = new StringBuilder();
          for (UUID cfId : getDirtyCFIDs())
          {
              CFMetaData m = Schema.instance.getCFMetaData(cfId);
              sb.append(m == null ? "<deleted>" : m.cfName).append(" (").append(cfId).append("), ");
          }
          return sb.toString();
      }
docs: For debugging, not fast