src/vs/base/parts/quickinput/browser/quickInputBox.ts/QuickInputBox/showDecoration
class QuickInputBox:	showDecoration(decoration: Severity): void {
		if (decoration === Severity.Ignore) {
			this.inputBox.hideMessage();
		} else {
			this.inputBox.showMessage({ type: decoration === Severity.Info ? MessageType.INFO : decoration === Severity.Warning ? MessageType.WARNING : MessageType.ERROR, content: '' });
		}
	}