src/vs/workbench/services/themes/browser/workbenchThemeService.ts/WorkbenchThemeService/updateDynamicCSSRules
class WorkbenchThemeService:	private updateDynamicCSSRules(themeData: IColorTheme) {
		const cssRules = new Set<string>();
		const ruleCollector = {
			addRule: (rule: string) => {
				if (!cssRules.has(rule)) {
					cssRules.add(rule);
				}
			}
		};
		ruleCollector.addRule(`.monaco-workbench { forced-color-adjust: none; }`);
		themingRegistry.getThemingParticipants().forEach(p => p(themeData, ruleCollector, this.environmentService));
		_applyRules([...cssRules].join('\n'), colorThemeRulesClassName);
	}