ruby-actioncable 2:5.2.3+dfsg-3 (amd64 binary) in ubuntu focal

 Action Cable seamlessly integrates WebSockets with the rest of your Rails
 application. It allows for real-time features to be written in Ruby in the same
 style and form as the rest of your Rails application, while still being
 performant and scalable. It's a full-stack offering that provides both a
 client-side JavaScript framework and a server-side Ruby framework. You have
 access to your full domain model written with Active Record or your ORM of
 choice.