src/vs/workbench/services/views/browser/viewDescriptorService.ts/ViewDescriptorService/viewCustomizations
class ViewDescriptorService:	private get viewCustomizations(): IViewsCustomizations {
		if (!this._viewCustomizations) {
			this._viewCustomizations = JSON.parse(this.getStoredViewCustomizationsValue()) as IViewsCustomizations;
			this._viewCustomizations.viewContainerLocations = this._viewCustomizations.viewContainerLocations ?? {};
			this._viewCustomizations.viewLocations = this._viewCustomizations.viewLocations ?? {};
		}
		return this._viewCustomizations;
	}