validateCheckboxGroup static method

String? validateCheckboxGroup(
  1. List<String> selectedKeys, {
  2. String fieldName = 'option',
})

Implementation

static String? validateCheckboxGroup(
    List<String> selectedKeys, {
      String fieldName = 'option',
    }) {
  if (selectedKeys.isEmpty) {
    return 'Please select at least one $fieldName';
  }
  return null;
}