`id` should not be required.

[aykutkardas]

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• I'm submitting a ...

  • [x] feature request

• What is the current behavior? Initial data

[
  {
    "id": 1,
    "label": "Animal",
    "nodes": [
      {
        "id": 2,
        "label": "Dog"
      },
      {
        "id": 3,
        "label": "Cat"
      }
    ]
  }
]

• What is the expected behavior? If I don't give an id it should generate it.

[
  {
    "label": "Animal",
    "nodes": [
      {
        "label": "Dog"
      },
      {
        "label": "Cat"
      }
    ]
  }
]

• What is the motivation / use case for changing the behavior? Common usage is like this. In addition, it is tiring for the end user to create an id for unidentified data.