When (runtime-api 2.1.0-alpha API)

```
@Repeatable(Whens.class)
@Retention(RUNTIME)
@Target(FIELD)
public @interface When
```
This annotation determines whether a property is visible and serializable. A property might only be visible and serializable when another property has a given value, for example: HTTP Security configuration should be visible and serializable only when the chosen HTTP protocol is 'HTTPS'.

Field Summary

Fields
Modifier and Type Fields Description

static String BLANK

static String NOT_BLANK

static String NOT_SCRIPT

static String NULL

static String SCRIPT

Required Element Summary

Required Elements
Modifier and Type	Required Element	Description
`String`	`propertyName`	The related property name on which we want to verify if a given value is currently assigned to it.
`String`	`propertyValue`	The target value we want the condition to be true for.

- Field Detail
  - NULL
```
static final String NULL
```
- - BLANK
```
static final String BLANK
```
- - NOT_BLANK
```
static final String NOT_BLANK
```
- - SCRIPT
```
static final String SCRIPT
```
- - NOT_SCRIPT
```
static final String NOT_SCRIPT
```
- Element Detail
  - propertyName
```
String propertyName
```
    The related property name on which we want to verify if a given value is currently assigned to it.
- - propertyValue
```
String propertyValue
```
    The target value we want the condition to be true for.