A model representing tree structure.

Features

• recursively defined
• JSON serializable
• infinitely extensible
• crud leaf
• crud node

Usage

typedef TaskList = Tree<Task, Header>;
typedef Task = Leaf<Task, Header>; 
typedef Folder = Node<Task, Header>;

final TaskList todos =
    Folder(id: 'todos', value: Header(title: 'Todays todo'), subTrees: [
  Folder(
    id: 'exercise',
    value: Header(
      title: 'Exercise',
      description: 'For brain Helthy',
    ),
    subTrees: [
      Task(id: 'running_task', value: Task(title: 'Running', completed: false)),
      Task(id: 'squat_task', value: Task(title: 'Squat', completed: false)),
    ],
  ),
  Task(id: 'study_math_task', value: Task(title: 'Study math', completed: false))
]);