Install libclass-isa-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libclass-isa-perl
Description:
report the search path for a class's ISA tree
Class::ISA returns the list of classes that the current class inherits from, listed in the order that Perl would search for a method not implemented in the current class. The list contains no duplicates.
Homepage: http://search.cpan.org/dist/Class-ISA/
Version: 0.36-5
Section: universe/perl