code: public static AstyanaxTable createUnknown(long uuid, Placement placement, @Nullable String name) {
          AstyanaxStorage storage = new AstyanaxStorage(
                  uuid, RowKeyUtils.NUM_SHARDS_UNKNOWN, false/*reads-not-allowed*/, placement.getName(), Suppliers.ofInstance(placement));
          return new AstyanaxTable(
                  name != null ? name : "__unknown:" + TableUuidFormat.encode(uuid),
                  new TableOptionsBuilder().setPlacement(placement.getName()).build(),
                  ImmutableMap.<String, Object>of("~unknown", true, "uuid", uuid),
                  null/*availability*/,
                  storage, ImmutableList.of(storage),
                  Suppliers.<Collection<DataCenter>>ofInstance(ImmutableList.<DataCenter>of()));
      }
docs: Creates a placeholder for unknown tables.  A table may be unknown for one of two reasons:  1) the table
  used to exist but has been deleted, or 2) the table never existed.  In the former case the table will have
  a name, but in the latter case the table will be unnamed and the "name" parameter will be null.