src/vs/workbench/services/decorations/browser/decorationsService.ts/DecorationStyles/_onThemeChange
class DecorationStyles:	private _onThemeChange(): void {
		this._decorationRules.forEach(rule => {
			rule.removeCSSRules(this._styleElement);
			rule.appendCSSRules(this._styleElement, this._themeService.getColorTheme());
		});
	}