Function layerDeletion

layerDeletion(listenerId, fn): void
JMap.Event.Layer.on.layerDeletion

This event is triggered when a layer is deleted.
Parameters
- listenerId: string
  Your listener id (must be unique for all layer events)
- fn: ((params) => void)
  Your listener function
  - - (params): void
    - Parameters
      params: JLayerEventParams
      Returns void
Returns void
Example
```
// Each time a layer is deleted, will display a message in the console
JMap.Event.Layer.on.layerDeletion(
   "custom-layer-deletion",
   params => {
     console.log(`Layer id="${params.layerId}" has been deleted client side`)
   }
)
```