Function getSelectedFeaturesForLayer

getSelectedFeaturesForLayer(layerId): GeoJSON.Feature[]
JMap.Map.Selection.getSelectedFeaturesForLayer

Returns the current selected features for a specific JMap layer.
Parameters
- layerId: JId
Returns GeoJSON.Feature[]
an array of GeoJSON features
Example
```
// returns the current selected features for layer 3
JMap.Map.Selection.getSelectedFeaturesForLayer(3)
```