# otherKeyValue method Null safety

1. @override

String otherKeyValue(

1. String myString,
2. KeyValue k

)
override

## Implementation

    @override
    String otherKeyValue(String myString, KeyValue k) {
      if (k.key == theImage) {
        var value = k.value;
        var url = image(k);
        if (url != null) {
          myString = k.replaceParamInStringWithString(myString, url);
        } else {
          myString = k.replaceParamInStringWithString(
              // ignore: prefer_single_quotes
              myString,
              "Image with reference $value does not exist");
        }
        return myString;
      } else {
        return super.otherKeyValue(myString, k);
      }
    }