cnpj static method

FormFieldValidator<String> cnpj(
  1. String m
) 
 Validatorless.cnpj('This CNPJ is not valid')

Implementation

static FormFieldValidator<String> cnpj(String m) {
  return (v) {
    if (v?.isEmpty ?? true) return null;
    if (CNPJValidator.isValid(v!))
      return null;
    else
      return m;
  };
}