Function getLayerAttributesWithStatistics

getLayerAttributesWithStatistics(layerId): Promise<JLayerAttributeWithStatistics[]>
JMap.Layer.getLayerAttributesWithStatistics

Returns the layer's attributes with their statistics.
Parameters
- layerId: JId
  The JMap layer id
Returns Promise<JLayerAttributeWithStatistics[]>
Throws
Error if no layer found for the id

Example
```
// returns the attributes of layer id=3 with their statistics
JMap.Layer.getLayerAttributesWithStatistics(3)
```