src/vs/workbench/browser/parts/panel/panelPart.ts/BasePanelPart/setStoredPlaceholderViewContainersValue
class BasePanelPart:	private setStoredPlaceholderViewContainersValue(value: string): void {
		this.storageService.store(this.placeholdeViewContainersKey, value, StorageScope.WORKSPACE, StorageTarget.MACHINE);
	}