Function hasAnyVisibleByLayerId

hasAnyVisibleByLayerId(layerId): boolean
JMap.Layer.Thematic.hasAnyVisibleByLayerId

Returns true if the layer has at least one thematic displayed on the map.
Parameters
- layerId: JId
  The JMap layer id
Returns boolean
Throws
Error if no layer found for the id, or if the layer is a layer group.

Example
```
// returns false if no thematic is displayed for layer id=4
JMap.Layer.Thematic.hasAnyVisibleByLayerId(4)
```