background
  The opacity at which the background will be drawn.
Use static method BackgroundLayer.defaultBackgroundOpacity to set the default property.
Parameters
background
value of backgroundOpacity
The opacity at which the background will be drawn.
Use static method BackgroundLayer.defaultBackgroundOpacityAsExpression to set the default property.
Parameters
background
value of backgroundOpacity as Expression
The opacity at which the background will be drawn.