Function isEmptyByLayerId

isEmptyByLayerId(layerId): boolean
JMap.Map.Selection.isEmptyByLayerId

Returns true if no selection is made for the specified layer.

If at least one feature is selected on the layer, returns false.
Parameters
- layerId: JId
Returns boolean
Example
```
// Returns true if no selection is made for layer id 5.
JMap.Map.Selection.isEmptyByLayerId(5)
```