src/vs/workbench/browser/parts/views/viewPaneContainer.ts/ViewPaneContainer/isViewMergedWithContainer
class ViewPaneContainer:	isViewMergedWithContainer(): boolean {
		if (!(this.options.mergeViewWithContainerWhenSingleView && this.paneItems.length === 1)) {
			return false;
		}
		if (!this.areExtensionsReady) {
			if (this.visibleViewsCountFromCache === undefined) {
				// TODO @sbatten fix hack for #91367
				return this.viewDescriptorService.getViewContainerLocation(this.viewContainer) === ViewContainerLocation.Panel;
			}
			// Check in cache so that view do not jump. See #29609
			return this.visibleViewsCountFromCache === 1;
		}
		return true;
	}