src/vs/workbench/common/views.ts/ViewsRegistry/getViewContainer
class ViewsRegistry:	getViewContainer(viewId: string): ViewContainer | null {
		for (const viewContainer of this._viewContainers) {
			const viewDescriptor = (this._views.get(viewContainer) || []).filter(v => v.id === viewId)[0];
			if (viewDescriptor) {
				return viewContainer;
			}
		}
		return null;
	}