src/vs/base/parts/quickinput/browser/quickInput.ts/QuickInput/showMessageDecoration
class QuickInput:	protected showMessageDecoration(severity: Severity) {
		this.ui.inputBox.showDecoration(severity);
		if (severity !== Severity.Ignore) {
			const styles = this.ui.inputBox.stylesForType(severity);
			this.ui.message.style.color = styles.foreground ? `${styles.foreground}` : '';
			this.ui.message.style.backgroundColor = styles.background ? `${styles.background}` : '';
			this.ui.message.style.border = styles.border ? `1px solid ${styles.border}` : '';
			this.ui.message.style.marginBottom = '-2px';
		} else {
			this.ui.message.style.color = '';
			this.ui.message.style.backgroundColor = '';
			this.ui.message.style.border = '';
			this.ui.message.style.marginBottom = '';
		}
	}