Readonly dittoThe Ditto instance this store observer is registered with.
Optional Readonly queryThe query arguments of the store observer (as passed when registering it).
Readonly queryThe query string of the store observer (as passed when registering it).
Convenience property, returns true once the store observer has been
cancelled.
A store observer invokes a given handler whenever results for its query change.
The store observer will remain active until it is cancelled, or the Ditto instance managing the observer has been closed.
Create a store observer by calling
ditto.store.registerObserver().