> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/perl6-rosettacode/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/perl6-rosettacode/programming_tasks/i/inheritance/multiple.md).

# Multiple

```perl
class Camera {}
class MobilePhone {}
class CameraPhone is Camera is MobilePhone {}

say CameraPhone.^mro;     # undefined type object
say CameraPhone.new.^mro; # instantiated object
```

#### Output:

```
CameraPhone() Camera() MobilePhone() Any() Mu()
CameraPhone() Camera() MobilePhone() Any() Mu()
```

The `.^mro` is not an ordinary method call, but a call to the object's metaobject that returns the method resolution order for this type.