{
    my %is_internal_type = map { $_ => 1 } qw(
        ARRAY
        HASH
        SCALAR
        GLOB
        CODE
    );

    sub isa
    {
        my $self = shift;
        my ($type) = @_;

        return if $is_internal_type{$type};
        return $self->SUPER::isa($type);
    }
}