Any MOP in Mouse has no attributes.
-And C<< $metaclass->meta->make_immutable() >> does not yet work as you expect.
-B<Don not make metaclasses immutalbe>.
+For this reason, C<< $metaclass->meta->make_immutable() >> does not yet work as you expect.
+B<Don not make metaclasses immutable>.
=head3 Mouse::Meta::Instance