src/vs/editor/contrib/hover/browser/contentHover.ts/EditorHoverStatusBar/addAction
class EditorHoverStatusBar:	public addAction(actionOptions: { label: string; iconClass?: string; run: (target: HTMLElement) => void; commandId: string }): IEditorHoverAction {
		const keybinding = this._keybindingService.lookupKeybinding(actionOptions.commandId);
		const keybindingLabel = keybinding ? keybinding.getLabel() : null;
		this._hasContent = true;
		return this._register(HoverAction.render(this.actionsElement, actionOptions, keybindingLabel));
	}