Method mutate

Fleece/Integration/MCollection.hh:91–100

        }

        void mutate() {
            assert(_mutable);
            if (!_mutated) {
                _mutated = true;
                if (_slot)
                    _slot->mutate();
                if (_parent)
                    _parent->mutate();
            }
        }

    private:
        MCollection(const MCollection&) =delete;