# Foo.pm

package Foo;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT_OK = qw(
   &Foo::transform_one
   &Foo::transform_two);
our %EXPORT_TAGS = (
    transforms => [qw(
        &Foo::transform_one
        &Foo::transform_two]);

# ... rest of Foo.pm

# Then in script.pl:

use Foo qw(:transforms);

say transform_one("xyzabc");