Create a hex dumper for the specified blob that hex dumps the bytes of the blob starting with the min(offset, blob‐>length()) byte and until min(offset + length, blob‐>length()) byte to the output stream when passed to operator<<. See operator<<(bsl::ostream&, const BlobUtilHexDumper&) for details. The behavior is undefined unless 0 <= offset && 0 <= length.