PropagateNull

```
@Retention(RUNTIME)
@Target({PARAMETER,FIELD,METHOD,TYPE})
@Beta
public @interface PropagateNull
```
Signals that the annotated property signals the presence of the mapped type: reflective mappers should map a null bean if this property is null, rather than a present bean with a null property value. This is useful e.g. for a LEFT OUTER JOIN or an optionally-present compound value type.

- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  java.lang.String value
  When annotating a type, the value is the column name to check for null.

- Element Detail
  - value
```
java.lang.String value
```
    When annotating a type, the value is the column name to check for null. When annotating a property, the value is unused: instead, the property value is tested against null.
    
    Returns:
    
    the column name whose null-ness shall be propagated
    
    Default:
    
    ""