code: public static Span prefix(CharSequence row, Column colPrefix) {
      Objects.requireNonNull(row);
      Objects.requireNonNull(colPrefix);
      return prefix(Bytes.of(row), colPrefix);
    }
docs: Returns a Span that covers all columns beginning with a row and {@link Column} prefix. The
  {@link Column} passed to this method can be constructed without a qualifier or visibility to
  create a prefix Span at the family or qualifier level. String parameters will be encoded as
  UTF-8