Function isAllocated

ThirdParty/jsoncpp/vtkjsoncpp/json/json.h:1167–1167

    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);