code: public List<RowCell> getCells(@Nonnull String family) {
      Preconditions.checkNotNull(family, "family");
  
      int start = getFirst(family, null);
      if (start < 0) {
        return ImmutableList.of();
      }
  
      int end = getLast(family, null, start);
  
      return getCells().subList(start, end + 1);
    }
docs: Returns a sublist of the cells that belong to the specified family.
  
  @see RowCell#compareByNative() For details about the ordering.