DiffFuzz (jqf 2.0 API)

```
@Target(METHOD)
@Retention(RUNTIME)
public @interface DiffFuzz
```
The DiffFuzz annotation marks a method as an entry-point for regression-based fuzz testing.

- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  String cmp

- Element Detail
  - cmp
```
String cmp
```
    Default:
    
    ""