extensions/gulp/src/main.ts/FolderDetector/start
class FolderDetector:	public start(): void {
		const pattern = path.join(this._workspaceFolder.uri.fsPath, '{node_modules,gulpfile{.babel.js,.esm.js,.js,.mjs,.cjs,.ts}}');
		this.fileWatcher = vscode.workspace.createFileSystemWatcher(pattern);
		this.fileWatcher.onDidChange(() => this.promise = undefined);
		this.fileWatcher.onDidCreate(() => this.promise = undefined);
		this.fileWatcher.onDidDelete(() => this.promise = undefined);
	}