Raster Layer Descriptor
constructor(id: String, source: String, quality: DataQuality = DataQuality.exact, paint: RasterLayerPaint = RasterLayerPaint(
raster = RasterPaint()
), maskLayerIds: List<String> = emptyList(), maskLayerId: String? = null, layerMask: LayerMaskSpec? = null, stencilLayerMask: StencilLayerMaskSpec? = null)