Document.TtlMillis

@Documented
@Retention(value = RetentionPolicy.CLASS)
@Target(value = [ElementType.FIELD, ElementType.METHOD])
public annotation Document.TtlMillis

Marks a member field of a document as the document's time-to-live (TTL).

The document will be automatically deleted TtlMillis milliseconds after CreationTimestampMillis.

This field is not required. If not present, not set, or set to 0, the document will never expire or be auto-deleted until the app is uninstalled or removeAsync is called.

If present, the field must be of type long or Long.

See the class description of Document for other requirements (i.e. if present it must be visible, or have a visible getter and setter, or be exposed through a visible constructor).