Additional options possible for a render context
Fields
optionalversion:Null<String>
optionalbackground:Null<Int>
An optional `background` property to be provided to rendering,
a value of `null` means no background color.
optionalantialiasing:Null<Int>
Whether to enable anti-aliasing, `0` is disabled, `2` enables
2x2 anti-aliasing or `4` enables 4x4 anti-aliasing.