# Package org.apache.tapestry5.internal.event

[INTERNAL USE ONLY] support classes for event listeners; API subject to change

See: Description

- Class Summary
  Class | Description
  --- | ---
  InvalidationEventHubImpl | Base implementation class for classes (especially services) that need to manage a list of `InvalidationListener`s.

## Package org.apache.tapestry5.internal.event Description

[INTERNAL USE ONLY] support classes for event listeners; API subject to change

5.6.4 - Copyright © 2003-2021 The Apache Software Foundation.