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Showing content from https://www.mongodb.com/docs/realm-sdks/java/latest/io/realm/MapChangeSet.html below:

MapChangeSet (Realm 10.10.1)

- Method Summary All Methods Instance Methods Abstract Methods Modifier and Type Method Description T[] getChanges()
  Array containing the keys that have been modified in the previous version of the map.
  T[] getDeletions()
  The number of entries that have been deleted in the previous version of the map.
  T[] getInsertions()
  Array containing the keys that have been inserted in the previous version of the map.
  boolean isEmpty()
  Whether the change set is empty or not.

- Method Detail
  - getDeletions
```
T[] getDeletions()
```
    The number of entries that have been deleted in the previous version of the map.
    
    Returns:
    
    array with the keys that have been deleted.
  - getInsertions
```
T[] getInsertions()
```
    Array containing the keys that have been inserted in the previous version of the map.
    
    Returns:
    
    array with the keys that have been inserted.
  - getChanges
```
T[] getChanges()
```
    Array containing the keys that have been modified in the previous version of the map.
    
    Returns:
    
    array with the keys that have been modified.
  - isEmpty
```
boolean isEmpty()
```
    Whether the change set is empty or not. This is needed to detect whether a notification has been triggered right after subscription.
    
    Returns:
    
    whether the change set contains changes.

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