setTheme
Set window theme, pass in null or undefined to follow system theme
Platform-specific
Linux / macOS: Theme is app-wide and not specific to this window.
iOS / Android: Unsupported.
Use {@link Window.theme} to read the effective theme and {@link Window.onThemeChanged} to react to changes.
Since
2.0.0
Parameters
theme
The theme to apply, or null/undefined to follow the system theme.