Function displayLayerExtent

displayLayerExtent(layerId, params?): boolean
JMap.Map.displayLayerExtent

Displays the layer extent of the given layer Id

The layer extent will disappear after a few seconds
Parameters
- layerId: JId
  a layer Id
- Optional params: JDisplayExtentParams
  (see example)
Returns boolean
true if the layer has an extent or false otherwise.
Example
```
// Move to layer 4 extent and display it for a few second
JMap.Map.displayLayerExtent(4, {moveToExtent: true})
```