A Document has changed. May be the result of multiple writes, including deletes, that ultimately resulted in a new value for the Document. Multiple DocumentChange messages may be returned for the same logical change, if multiple targets are affected.

Attributes

• document (Document): The new state of the Document. If `mask` is set, contains only fields that were updated or added. Defaults to: null.
• removedTargetIds ([integer()]): A set of target IDs for targets that no longer match this document. Defaults to: null.
• targetIds ([integer()]): A set of target IDs of targets that match this document. Defaults to: null.