Hierarchical data with zero configuration

Drawing a simple chart is easily done--only the value attribute is required:

<p-organizationChart [value]="data"></p-organizationChart>

In the component class, we need to create an array of nested TreeNode instances. In the simple use case, providing labels is enough:

data: TreeNode[];

ngOnInit() {
  this.data = [
    {
      label: 'CEO',
      expanded: true,
      children: [
        {
          label: 'Finance',
          expanded: true,
          children: [
            {label: 'Chief Accountant'},
            {label: 'Junior Accountant'}
          ]
        },
        {label: 'Marketing'},
        {
          label: 'Project Manager',
          expanded: true,
          children: [
            {label: 'Architect'},
            {label: 'Frontend Developer'},
            {label: 'Backend Developer'}
          ]
        }
      ]
    }
  ];
}

By default, tree...