Is there any particular reason not to have Function::Parameters in Debian ?
It's by far most superior CPAN offering for the "add custom method and function signatures" task on CPAN.
Debian does carry Method::Signatures that is inferior (by its author admission) to that module and has numerous problems.
Function::Parameters is also very light and has very few dependencies.
Perl users on Debian platforms will certainly appreciate if this module is added.