src/vs/base/browser/ui/dropdown/dropdown.ts/BaseDropdown/dispose
class BaseDropdown:	override dispose(): void {
		super.dispose();
		this.hide();

		if (this.boxContainer) {
			this.boxContainer.remove();
			this.boxContainer = undefined;
		}

		if (this.contents) {
			this.contents.remove();
			this.contents = undefined;
		}

		if (this._label) {
			this._label.remove();
			this._label = undefined;
		}
	}