src/vs/base/browser/ui/dropdown/dropdown.ts/Dropdown/show
class Dropdown:	override show(): void {
		super.show();

		this.element.classList.add('active');

		this.contextViewProvider.showContextView({
			getAnchor: () => this.getAnchor(),

			render: (container) => {
				return this.renderContents(container);
			},

			onDOMEvent: (e, activeElement) => {
				this.onEvent(e, activeElement);
			},

			onHide: () => this.onHide()
		});
	}