src/vs/platform/severityIcon/common/severityIcon.ts/className
	export function className(severity: Severity): string {
		switch (severity) {
			case Severity.Ignore:
				return 'severity-ignore ' + Codicon.info.classNames;
			case Severity.Info:
				return Codicon.info.classNames;
			case Severity.Warning:
				return Codicon.warning.classNames;
			case Severity.Error:
				return Codicon.error.classNames;
			default:
				return '';
		}
	}