Function getAllByLayerId

getAllByLayerId(layerId): JLayerThematic[]
JMap.Layer.Thematic.getAllByLayerId

Returns all thematics for the specified layer.
Parameters
- layerId: JId
  The JMap layer id
Returns JLayerThematic[]
Throws
Error if no layer found for the id, or if the layer is a layer group.

Example
```
// returns all thematics of layer id=4
JMap.Layer.Thematic.getAllByLayerId(4)
```