src/vs/workbench/browser/parts/paneCompositePart.ts/PaneCompositeParts/getVisiblePaneCompositeIds
class PaneCompositeParts:	getVisiblePaneCompositeIds(viewContainerLocation: ViewContainerLocation): string[] {
		return this.getSelectorPartByLocation(viewContainerLocation).getVisiblePaneCompositeIds();
	}