Function begin

tutorials/common/imgui/imgui.h:1792–1792

    inline const T&     operator[](int i) const             { IM_ASSERT(i >= 0 && i < Size); return Data[i]; }

    inline T*           begin()                             { return Data; }
    inline const T*     begin() const                       { return Data; }
    inline T*           end()                               { return Data + Size; }
    inline const T*     end() const                         { return Data + Size; }