```
public interface Stage
```
An API for Hibernate Reactive where non-blocking operations are represented by a Java CompletionStage.
The Stage.Query, Stage.Session, and Stage.SessionFactory interfaces declared here are simply non-blocking counterparts to the similarly-named interfaces in Hibernate ORM.

Nested Classes
Modifier and Type	Interface	Description
`static interface`	`Stage.Closeable`	An object whose `Stage.Closeable.close()` method returns a `CompletionStage`.
`static interface`	`Stage.Query<R>`	A non-blocking counterpart to the Hibernate `Query` interface, allowing reactive execution of HQL and JPQL queries.
`static interface`	`Stage.Session`	A non-blocking counterpart to the Hibernate `Session` interface, allowing a reactive style of interaction with the database.
`static interface`	`Stage.SessionFactory`	Factory for `reactive sessions`.
`static interface`	`Stage.StatelessSession`	A non-blocking counterpart to the Hibernate `StatelessSession` interface, which provides a command-oriented API for performing bulk operations against a database.
`static interface`	`Stage.Transaction`	Allows code within `Stage.Session.withTransaction(Function)` to mark a transaction for rollback.

Static Methods
Modifier and Type	Method	Description
`static <T> java.util.concurrent.CompletionStage<T>`	`fetch(T association)`	Asynchronously fetch an association that's configured for lazy loading.

Interface Stage