message: String is still not string
diff: @@ -43,7 +43,7 @@ private:
  static Compressor::ZlibCompressorImpl::CompressionStrategy compressionStrategyEnum(
  envoy::config::filter::http::gzip::v2::Gzip_CompressionStrategy compression_strategy);
  static StringUtil::CaseUnorderedSet
  - contentTypeSet(const Protobuf::RepeatedPtrField<std::string>& types);
  + contentTypeSet(const Protobuf::RepeatedPtrField<Envoy::ProtobufTypes::String>& types);
  static uint64_t contentLengthUint(Protobuf::uint32 length);
  static uint64_t memoryLevelUint(Protobuf::uint32 level);
  