php-zend-eventmanager 3.2.0-1 (arm64 binary) in ubuntu cosmic

 The `Zend\EventManager` is a component designed for the following use cases:
 .
  * Implementing simple subject/observer patterns.
  * Implementing Aspect-Oriented designs.
  * Implementing event-driven architectures.
 .
 The basic architecture allows you to attach and detach listeners to named
 events, both on a per-instance basis as well as via shared collections;
 trigger events; and interrupt execution of listeners.
 .
 Zend is a PHP framework for developing web applications and services.