validatePoliticalDistrict function

String? validatePoliticalDistrict(
  1. String? value
)

Validates Political District. Returns null if valid, or an error message string if invalid.

Implementation

String? validatePoliticalDistrict(String? value) {
  if (value == null || value.isEmpty) {
    return 'Please enter a political district';
  }
  // Example validation, adjust as necessary for district formats.
  return null;
}