Install libclass-ehierarchy-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libclass-ehierarchy-perl
Description:
module that provides a base class for hierarchally ordered objects
Class::EHierarchy is intended for use as a base class for custom objects, but objects that need one or more of the following features: orderly bottom-up destruction of objects, opaque objects, class-based access restrictions for properties and methods, primitive strict property type awareness, alias-based object retrieval.
Homepage: https://metacpan.org/release/Class-EHierarchy
Version: 2.00-1
Section: universe/perl