src/vs/workbench/contrib/sessionSync/browser/sessionSync.contribution.ts/SessionSyncContribution/getChangedResources
class SessionSyncContribution:	private getChangedResources(repository: ISCMRepository) {
		const trackedUris = repository.provider.groups.elements.reduce((resources, resourceGroups) => {
			resourceGroups.elements.forEach((resource) => resources.add(resource.sourceUri));
			return resources;
		}, new Set<URI>()); // A URI might appear in more than one resource group

		return [...trackedUris];
	}