Method insert

src/include/minja/minja.hpp:210–214

  }

  void insert(size_t index, const Value& v) {
    if (!array_)
      throw std::runtime_error("Value is not an array: " + dump());
    array_->insert(array_->begin() + index, v);
  }
  void push_back(const Value& v) {
    if (!array_)
      throw std::runtime_error("Value is not an array: " + dump());