Function setTerrainControlVisibility

setTerrainControlVisibility(isVisible): void
JMap.Map.setTerrainControlVisibility

Changes the Terrain control visibility on the map.
Parameters
- isVisible: boolean
  true to display the Terrain control, false to hide
Returns void
Example
```
// displays the Terrain control on the map
JMap.Map.setTerrainControlVisibility(true)

// hides the Terrain control on the map
JMap.Map.setTerrainControlVisibility(false)
```