Method GetCapacity

include/rapidjson/internal/stack.h:134–134

    bool Empty() const { return stackTop_ == stack_; }
    size_t GetSize() const { return static_cast<size_t>(stackTop_ - stack_); }
    size_t GetCapacity() const { return static_cast<size_t>(stackEnd_ - stack_); }

private:
    template<typename T>