/home/user/perl_modules/lib/perl5/My/FooVersion
    1.0/
        Foo.pm
    1.1/
        Foo.pm
    1.2/
        Foo.pm
    Devel/
        Foo.pm

##</code><code>##

use My::FooVersion::Devel::Foo;

##</code><code>##

use My::FooVersion::1.1::Foo;
use "My::FooVersion::1.1::Foo";
use My::FooVersion::"1.1"::Foo;
use My::FooVersion::'1.1'::Foo;
use 'My::FooVersion::1.1::Foo';

##</code><code>##

BEGIN { require Module; Module->import( LIST ); }