MutableValueInfo (ebean api 12.15.1 API)

```
public interface MutableValueInfo
```
Holds information on mutable values (like plain beans stored as json).
Used internally in EntityBeanIntercept for dirty detection on mutable values. Typically, mutation detection is based on a hash/checksum of json content or the original json content itself.
Refer to the mapping options @DbJson(mutationDetection).

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default Object`	`get()`	Creates a new instance from the internal json string.
`boolean`	`isEqualToObject(Object obj)`	Compares the given object to an internal value.
`MutableValueNext`	`nextDirty(String json)`	Compares the given json returning null if deemed unchanged or returning the MutableValueNext to use if deemed dirty/changed.

- Method Detail
  - nextDirty
```
MutableValueNext nextDirty(String json)
```
    Compares the given json returning null if deemed unchanged or returning the MutableValueNext to use if deemed dirty/changed.
    Returning MutableValueNext allows an implementation based on hash/checksum to only perform that computation once.
    
    Returns:
    
    Null if deemed unchanged or the MutableValueNext if deemed changed.
  - isEqualToObject
```
boolean isEqualToObject(Object obj)
```
    Compares the given object to an internal value.
    This is used to support changelog/beanState. The implementation can serialize the object into json form and compare it against the original json.
  - get
```
default Object get()
```
    Creates a new instance from the internal json string.
    This is used to provide an original/old value for change logging / persist listeners. This is only available for properties that have @DbJson(keepSource=true).