validateFreetext method
Implementation
List<CheckpointValidationError> validateFreetext(Checkpoint checkpoint) {
return [
if (checkpoint.freetext1.isNullOrEmpty)
CheckpointValidationError.freetext1IsWrongOrEmpty,
if (checkpoint.freetext2.isNullOrEmpty && checkpoint.numberOfValues > 1)
CheckpointValidationError.freetext2IsWrongOrEmpty,
];
}