code: public List<RowCell> getCells(@Nonnull String family, @Nonnull String qualifier) {
      Preconditions.checkNotNull(family, "family");
      Preconditions.checkNotNull(qualifier, "qualifier");
  
      return getCells(family, ByteString.copyFromUtf8(qualifier));
    }
docs: Returns a sublist of the cells that belong to the specified family and qualifier.
  
  @see RowCell#compareByNative() For details about the ordering.