Function resetRasterLayerTransparency

resetRasterLayerTransparency(layerId): number
JMap.Map.resetRasterLayerTransparency

Resets the raster layer transparency to its initial value as defined on the server
Parameters
- layerId: JId
  The JMap layer id
Returns number
the initial transparency value
Throws
Error if layer is not found or not a raster layer

Example
```
// Make raster layer id=3 transparent
JMap.Map.setRasterLayerTransparency(10, 1)
// Reset to its initial opacity
JMap.Map.resetRasterLayerTransparency(3)
```