Have you looked at the SYNOPSIS section of Module::Pluggable?

    use MyClass;
    my $mc = MyClass->new();
    # returns the names of all plugins installed under MyClass::Plugin
+::*
    my @plugins = $mc->plugins();
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If you blindly want to import all modules from a folder, take a look at glob and require. This is basically what Module::Pluggable does as well, but maybe you feel more confident in implementing it yourself.