src/vs/workbench/contrib/snippets/browser/snippetsFile.ts/SnippetFile/constructor
class SnippetFile:	constructor(
		readonly source: SnippetSource,
		readonly location: URI,
		public defaultScopes: string[] | undefined,
		private readonly _extension: IExtensionDescription | undefined,
		private readonly _fileService: IFileService,
		private readonly _extensionResourceLoaderService: IExtensionResourceLoaderService,
	) {
		this.isGlobalSnippets = extname(location.path) === '.code-snippets';
		this.isUserSnippets = !this._extension;
	}