multiple method

String? multiple({ required List<String?> validations, })

use to apply multiple validations

TextFormField(
  autovalidateMode: AutovalidateMode.onUserInteraction,
  controller: editController,
  validator: (value) => Mask.validations.multiple(
    validations: [
      Mask.validations.generic(value, min: 4, error: 'min 4'),
      Mask.validations.email(value, error: 'email inválido'),
    ],
  ),
),

Implementation

String? multiple({
  required List<String?> validations,
}) {
  for (var validation in validations) {
    if (validation != null) return validation;
  }
  return null;
}