src/vs/base/browser/ui/actionbar/actionbar.ts/ActionBar/doTrigger
class ActionBar:	private doTrigger(event: StandardKeyboardEvent): void {
		if (typeof this.focusedItem === 'undefined') {
			return; //nothing to focus
		}

		// trigger action
		const actionViewItem = this.viewItems[this.focusedItem];
		if (actionViewItem instanceof BaseActionViewItem) {
			const context = (actionViewItem._context === null || actionViewItem._context === undefined) ? event : actionViewItem._context;
			this.run(actionViewItem._action, context);
		}
	}