package Foo;
use Foo::Dates;
use Foo::Customer;
use Foo::Order;
use Foo::Company;
use Foo::Company::SalesReps;
use Foo::Extremely::Long::Package::Name;

##</code><code>##

package Foo;
use Foo::Dates ();
use Foo::Customer ();
use Foo::Order ();
use Foo::Company ();
use Foo::Company::SalesReps ();
use Foo::Extremely::Long::Package::Name ();

sub import {
    Foo::Dates -> export_to_level (2, @_);
    Foo::Customer -> export_to_level (2, @_);
    Foo::Order -> export_to_level (2, @_);
    ...
}