InSync means the Syncer has now sent all the existing keys in the datastore and the user of hte API has the full picture.

ResyncInProgress means the Syncer is resyncing with the datastore.

WaitForDatastore means the Syncer is waiting to connect to the datastore.

Update from the Syncer.

Event represents a single event to a watched resource.

Client is the interface to the backend datastore.

SyncerParseFailCallbacks is an optional interface that can be implemented by a Syncer callback.

Interface can be implemented by anything that knows how to watch and report changes.

SyncStatus represents the overall state of the datastore.

WatchEventType defines the possible types of events.