Extension function for Layer to overload Unary operations.
Apply +Layer will add the layer to the StyleExtensionImpl.
Extension function for Pair<Layer, LayerPosition> to overload Unary operations.
Apply +Pair<Layer, LayerPosition> will add the layer to the StyleExtensionImpl at given LayerPosition.
Extension function for Source to overload Unary operations.
Apply +Source will add the source to the StyleExtensionImpl.
Extension function for Light to overload Unary operations.
Apply +Light will add the light to the StyleExtensionImpl.
Extension function for Terrain to overload Unary operations.
Apply +Terrain will add the terrain to the StyleExtensionImpl.
Extension function for ImageExtensionImpl to overload Unary operations.
Apply +ImageExtensionImpl will add the source to the StyleExtensionImpl.