src/vs/workbench/services/views/browser/viewDescriptorService.ts/ViewDescriptorService/getCachedViewPositions
class ViewDescriptorService:	private getCachedViewPositions(): Map<string, ICachedViewContainerInfo> {
		const result = new Map<string, ICachedViewContainerInfo>(JSON.parse(this.cachedViewPositionsValue));

		// Sanitize cache
		for (const [viewId, containerInfo] of result.entries()) {
			if (!containerInfo) {
				result.delete(viewId);
				continue;
			}

			// Verify a view that is in a generated has cached container info
			const generated = this.isGeneratedContainerId(containerInfo.containerId);
			const missingCacheData = this.cachedViewContainerInfo.get(containerInfo.containerId) === undefined;
			if (generated && missingCacheData) {
				result.delete(viewId);
			}
		}

		return result;
	}