code: @Override
      public Pair<ByteSlice, ByteSlice> splitOnLastLineEnd() {
          Pair<ByteSlice, ByteSlice> sliced = suffix.splitOnLastLineEnd();
          return Pair.of(ByteSlice.join(this.prefix, sliced.first), sliced.second);
      }
docs: /*
  -----------------------------------------------------------
  end
  -----------------------------------------------------------