src/vs/base/browser/ui/menu/menu.ts/Menu/style
class Menu:	style(style: IMenuStyles): void {
		const container = this.getContainer();

		const fgColor = style.foregroundColor ? `${style.foregroundColor}` : '';
		const bgColor = style.backgroundColor ? `${style.backgroundColor}` : '';
		const border = style.borderColor ? `1px solid ${style.borderColor}` : '';
		const shadow = style.shadowColor ? `0 2px 4px ${style.shadowColor}` : '';

		container.style.border = border;
		this.domNode.style.color = fgColor;
		this.domNode.style.backgroundColor = bgColor;
		container.style.boxShadow = shadow;

		if (this.viewItems) {
			this.viewItems.forEach(item => {
				if (item instanceof BaseMenuActionViewItem || item instanceof MenuSeparatorActionViewItem) {
					item.style(style);
				}
			});
		}
	}