@startuml

class App {
  getLayerGroupByDivId()
}
class Stage
class LayerGroup {
  getActiveViewLayer()
  getActiveDrawLayer()
}
class ViewLayer
class DrawLayer

App --* "1" Stage
Stage --* "0..*" LayerGroup
LayerGroup --* "0..*" ViewLayer
LayerGroup --* "0..*" DrawLayer

@enduml
