InterestValidationFailureCallback (jndn 0.22 API)

```
public interface InterestValidationFailureCallback
```
A class implements InterestValidationFailureCallback if it has a failureCallback method used to report a failed Interest validation.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`failureCallback(Interest interest, ValidationError error)`

void failureCallback(Interest interest,
                     ValidationError error)

Interface InterestValidationFailureCallback