minLength static method

String? minLength(
  1. String? value,
  2. int length, [
  3. String fieldName = 'This field'
])

Implementation

static String? minLength(String? value, int length,
    [String fieldName = 'This field']) {
  if (value == null || value.length < length) {
    return '$fieldName must be at least $length characters';
  }
  return null;
}