AnyFormField<T> class

A form-enabled wrapper around AnyField that provides form integration and validation.

AnyFormField combines the flexibility of AnyField with Flutter's form functionality, allowing it to be used within Form widgets with validation, saving, and error display capabilities.

Example usage:

Form(
  key: _formKey,
  child: AnyFormField<List<String>>(
    displayBuilder: (context, tags) => Wrap(
      children: tags.map((t) => Chip(label: Text(t))).toList(),
    ),
    decoration: InputDecoration(labelText: 'Tags'),
    validator: (value) {
      if (value?.isEmpty ?? true) return 'Please add at least one tag';
      return null;
    },
    onSaved: (value) => _savedTags = value,
    onTap: (currentTags) async {
      final result = await showTagSelector(
        context,
        initialTags: currentTags ?? []
      );
      if (result != null) {
        // Form field handles controller update
      }
    },
  ),
)