ReadHexDigits     987 third_party/protobuf/src/google/protobuf/io/tokenizer.cc   if (!ReadHexDigits(p, len, code_point))
ReadHexDigits     997 third_party/protobuf/src/google/protobuf/io/tokenizer.cc     if (ReadHexDigits(p + 2, 4, &trail_surrogate) &&