You can inspect any package, as the symbols for My::Package live in the %My::Package:: hash. The easiest way to get at those hashes is via soft references:

use strict;
use Data::Dumper;

my $package = 'Data::Dumper'; # just as an example
{
    no strict 'refs'; # we're using strings as symbols. Nasty, but con
+venient
    warn Dumper \%{ "$package\::" };
};
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