$ perle 'use Judy::HS "MemUsed"';
"MemUsed" is not exported by the Judy::HS module at /home/ken/perl5/perlbrew/perls/perl-5.36.0/lib/site_perl/5.36.0/Sub/Exporter.pm line 778.
        Sub::Exporter::_do_import(HASH(0xa003f6ab8), ARRAY(0xa005d7d00)) called at /home/ken/perl5/perlbrew/perls/perl-5.36.0/lib/site_perl/5.36.0/Sub/Exporter.pm line 744
        Sub::Exporter::__ANON__("Judy::HS", "MemUsed") called at -e line 1
        main::BEGIN() called at -e line 1
        eval {...} called at -e line 1
BEGIN failed--compilation aborted at -e line 1.