Install libclass-perl by entering the following commands in the terminal:
sudo apt update sudo apt install libclass-perl
Description:
module providing aliases for __PACKAGE__
CLASS is a minimalistic Perl module that simply provides aliases for the special literal, __PACKAGE__, which represents the current package name at that point during program execution. The aliases are mapped at compile-time, so there is no performance hit except for compilation of the module itself. . This module ensures that CLASS and $CLASS can be used anywhere in place of __PACKAGE__, and since $CLASS is a scalar, it has the additional benefit of working in strings.
Homepage: http://search.cpan.org/dist/CLASS/
Version: 1.00-2
Section: universe/perl