CircleComponent.relative constructor
      
      CircleComponent.relative(})
     
    
With this constructor you define the CircleComponent in relation to the
parentSize. For example having a relation of 0.5 would create a circle
that fills half of the parentSize.
Implementation
CircleComponent.relative(
  double relation, {
  required Vector2 parentSize,
  super.position,
  super.scale,
  super.angle,
  super.anchor,
  super.paint,
  super.paintLayers,
  super.children,
  super.key,
}) : super(size: Vector2.all(relation * min(parentSize.x, parentSize.y)));