src/vs/workbench/contrib/tasks/browser/abstractTaskService.ts/TaskMap/get
class TaskMap:	public get(workspaceFolder: IWorkspace | IWorkspaceFolder | string): Task[] {
		const key = this.getKey(workspaceFolder);
		let result: Task[] | undefined = this._store.get(key);
		if (!result) {
			result = [];
			this._store.set(key, result);
		}
		return result;
	}