Nullable (rxmicro-validation 0.1 API)

@Documented
@Retention(SOURCE)
@Target({FIELD,METHOD,PARAMETER})
@SelfDocumented
public @interface Nullable

The annotated element may be optional, i.e. null.

Author:: nedis

- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  boolean off
  Allows to disable validation rule if validation inherited from super class.

- Element Detail
  - off
```
boolean off
```
    Allows to disable validation rule if validation inherited from super class. By default, disable is off
    
    Returns:
    
    true if the validation must be disabled, false otherwise
    
    Default:
    
    false