description

# Animation constructor Null safety

Animation(

1. [AnimationEffectReadOnly? effect,
2. AnimationTimeline? timeline]

)

## Implementation

    factory Animation(
        [AnimationEffectReadOnly? effect, AnimationTimeline? timeline]) {
      if (timeline != null) {
        return Animation._create_1(effect, timeline);
      }
      if (effect != null) {
        return Animation._create_2(effect);
      }
      return Animation._create_3();
    }