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