Method skip

src/serialization/impl/file.cpp:36–39

    void rewind() override { std::rewind(m_fptr); }

    void skip(int64_t bytes) override {
        auto err = fseek(m_fptr, bytes, SEEK_CUR);
        mgb_assert(!err);
    }

    void read(void* dst, size_t size) override {
        auto nr = fread(dst, 1, size, m_fptr);