Method resize

Fleece/Mutable/MutableArray.hh:59–59

        template <typename T>  void append(const T &t)     {heapArray()->append(t);}

        void resize(uint32_t newSize)               {heapArray()->resize(newSize);}
        void insert(uint32_t where, uint32_t n)     {heapArray()->insert(where, n);}
        void remove(uint32_t where, uint32_t n)     {heapArray()->remove(where, n);}