src/main/java/com/conveyal/gtfs/loader/ValidateFieldResult.java
public static ValidateFieldResult<String> from(ValidateFieldResult result) {
        ValidateFieldResult<String> stringResult = new ValidateFieldResult<>();
        stringResult.clean = String.valueOf(result.clean);
        stringResult.errors.addAll(result.errors);
        return stringResult;
    }
public static ValidateFieldResult<String> from(ValidateFieldResult result) {
        ValidateFieldResult<String> stringResult = new ValidateFieldResult<>();
        stringResult.clean = String.valueOf(result.clean);
        stringResult.errors.addAll(result.errors);
        return stringResult;
    }
Builder method that constructs a ValidateFieldResult with type String from the input result.