MapStruct set field value to a result of another mapper method

Given classes

Mapstruct: a particular case of shared mappings

In one mapper, I have this method

Set property without mapping in mapper Java Mapstruct

I have a mapper like:
Cat toAnotherCat(Cat origin);
And I need an another mapper like that (CatsHouse has a property: Cat oneOfCats;):
CatsHouse toNewCatsHouse(CatsHouse catsHouse)

mapstruct, nested classes avoid writing mapper for each nested class

I have source and target classes that look like this