Method setCapacity

include/sonic/dom/dynamicnode.h:589–594

  }

  sonic_force_inline void setCapacity(size_t new_cap) {
    sonic_assert(this->IsContainer());
    sonic_assert(this->o.next.children != nullptr);
    // first node is meta node
    ((MetaNode*)(this->o.next.children))->cap = new_cap;
  }

  sonic_force_inline void setMap(map_type* new_map) {
    sonic_assert(this->IsObject());