libsignatures-perl 0.13-2build1 (armhf binary) in ubuntu eoan

 signatures is a Perl pragma that provides a simple and robust way to declare
 named parameters for your subroutines. It provides a syntax similar to Perl
 function prototypes (see perlsub) and is robust since it does this without
 using source filters. It also provides a way to combine these signatures with
 normal Perl prototypes.