```
public interface ValidationListener
```
Implement this interface to register custom validation listener to the CombiningValidator. Those classes will be called whenever a token is being validated.
This might be relevant for writing Audit logs.

void onValidationError(ValidationResult result)

Modifier and Type	Method	Description
`void`	`onValidationError(ValidationResult result)`
`void`	`onValidationSuccess()`

Interface ValidationListener