extensions/git/src/decorationProvider.ts/GitDecorationProvider/collectSubmoduleDecorationData
class GitDecorationProvider:	private collectSubmoduleDecorationData(bucket: Map<string, FileDecoration>): void {
		for (const submodule of this.repository.submodules) {
			bucket.set(Uri.file(path.join(this.repository.root, submodule.path)).toString(), GitDecorationProvider.SubmoduleDecorationData);
		}
	}