CallOnUpdate

```
@Retention(RUNTIME)
@Target(METHOD)
public @interface CallOnUpdate
```
An annotation to mark that a method should be called when the bound model updates in a specific way. The method can have any access modifiers, i.e. it can be private.

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element	Description
`java.lang.String`	`model`	The model field name to bind to.
`java.lang.String[]`	`on`	What model update type to trigger on, or blank (default) for all updates.

- Element Detail
  - model
```
java.lang.String model
```
    The model field name to bind to. If this is left blank and the BindingContext has only a single BindableModel then it will bind to that.
    
    Default:
    
    ""
- - on
```
java.lang.String[] on
```
    What model update type to trigger on, or blank (default) for all updates.
    
    Default:
    
    {""}