src/vs/workbench/browser/parts/compositeBar.ts/CompositeDragAndDrop/constructor
class CompositeDragAndDrop:	constructor(
		private viewDescriptorService: IViewDescriptorService,
		private targetContainerLocation: ViewContainerLocation,
		private openComposite: (id: string, focus?: boolean) => Promise<IPaneComposite | null>,
		private moveComposite: (from: string, to: string, before?: Before2D) => void,
		private getItems: () => ICompositeBarItem[],
	) { }