Function isAllocated

external/jsoncpp/json/json.h:1151–1151

private:
  void setType(ValueType v) { bits_.value_type_ = static_cast<unsigned char> (v); }
  bool isAllocated() const { return bits_.allocated_; }
  void setIsAllocated(bool v) { bits_.allocated_ = v; }

  void initBasic(ValueType type, bool allocated = false);