Method BeginCollection

library/cpp/yson/writer.cpp:174–178

    }

    void TYsonWriter::BeginCollection(ETokenType beginToken) {
        Stream->Write(TokenTypeToChar(beginToken));
        ++Depth;
        BeforeFirstItem = true;
    }

    void TYsonWriter::CollectionItem(ETokenType separatorToken) {
        if (!IsTopLevelFragmentContext()) {