Features

参照カウンタ付きオブジェクトを保持する.

Usage

var disposed = false;
final ref = SmartReference.wrap(
    reference: 100,
    dispose: (value) {
        disposed = true;
    },
);

ref.addRef(); // ref == 2;
ref.release(); // ref == 1;
ref.release(); // ref == 0, call dispose();