my $ptrRegistrationArray = $session->param("registrationArray");

foreach my $reg (@$ptrRegistrationArray)
{
    print STDERR "reg is a " . ref($reg) . "\n";
    print STDERR "reg = " . Dumper($reg) . "\n";

    print STDERR "reg->can('testMethod') results:  " .
        $reg->can("testMethod") . "\n";

    #  testMethod() is basically a "hello world" for the
    #  Registration class.
    $reg->testMethod();

    #  Other work here
}