Any MOP has no attributes, so
C<< $metaclass->meta->make_immutable() >> does not yet work as you expect.
-=head3 C<Mouse::Meta::Instance>
+=head3 Mouse::Meta::Instance
Meta instance mechanism is not implemented.
Role exclusion, C<exclude()>, is not implemented.
-=head3 C<-traits> and C<-metaclass> in Mouse::Exporter
+=head3 -traits and -metaclass in Mouse::Exporter
C<< use Mouse -traits => ... >> and C<< use Mouse -metaclass => ... >> are not
yet implemented.
L<Mouse>
+L<Moose>
+
+L<Moose::Manual>
+
+L<Moose::Cookbook>
+
=cut