Method Refresh

library/cpp/yson/detail.h:120–127

            template <bool AllowFinish>
            void Refresh() {
                while (IsEmpty() && !TBlockStream::IsFinished()) {
                    TBlockStream::RefreshBlock();
                }
                if (IsEmpty() && TBlockStream::IsFinished() && !AllowFinish) {
                    ythrow TYsonException() << "Premature end of yson stream";
                }
            }

            void Refresh() {
                return Refresh<false>();