package MOP::Immutable::Point3D;
use strict;
use warnings;
use metaclass;
use base 'MOP::Point';
__PACKAGE__->meta->add_attribute('z' => (accessor => 'z'));
sub clear {
    my $self = shift;
    $self->SUPER::clear();
    $self->z(0);
}
__PACKAGE__->meta->make_immutable;
1;
__END__