This basically just makes sure that using +name on role attributes works right.
To install Benchmark::Perl::Formance::Cargo, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Benchmark::Perl::Formance::Cargo
CPAN shell
perl -MCPAN -e shell install Benchmark::Perl::Formance::Cargo
For more information on module installation, please visit the detailed CPAN module installation guide.