Function setVisible

setVisible(layerId, isVisible): void
JMap.Layer.setVisible

Set the visibility property of the layer.

If it's a JMap layer, it apply the visibility to it.

The visibility property is initialy defined on the project, and can be changed by the user through the JMap Server NG Core library.

If this property is false, the layer cannot be displayed on the map.

If it's true, the layer can be rendered on the map. The layer is rendered depending on the current map scale of the map, and the min / max scale defined for this layer.
Parameters
- layerId: JId
  The JMap layer id
- isVisible: boolean
  The new visibility property value for the layer
Returns void
Throws
Error if no layer found for the id

Example
```
// show layer id=5
JMap.Layer.setVisible(5, true)

// hide layer id=3
JMap.Layer.setVisible(3, false)
```