Represents a listener that can be removed by calling remove.

Marker protocol implemented by all supported cache settings.

The two cache types supported are PersistentCacheSettings and MemoryCacheSettings. Custom implementation is not supported.

Marker protocol implemented by all supported garbage collector settings.

The two cache types supported are MemoryEagerGCSettings and MemoryLRUGCSettings. Custom implementation is not supported.

A type that can initialize itself from a Firestore DocumentReference, which makes it suitable for use with the @DocumentID property wrapper.

Firestore includes extensions that make String and DocumentReference conform to DocumentIDWrappable.

Note that Firestore ignores fields annotated with @DocumentID when writing so there is no requirement to convert from the wrapped type back to a DocumentReference.

A type that can initialize itself from a Firestore Timestamp, which makes it suitable for use with the @ServerTimestamp property wrapper.

Firestore includes extensions that make Timestamp and Date conform to ServerTimestampWrappable.