src/vs/editor/standalone/browser/standaloneThemeService.ts/StandaloneThemeService/_updateActualTheme
class StandaloneThemeService:	private _updateActualTheme(desiredTheme: IStandaloneTheme | undefined): void {
		if (!desiredTheme || this._theme === desiredTheme) {
			// Nothing to do
			return;
		}
		this._theme = desiredTheme;
		this._updateThemeOrColorMap();
	}