The CI needs some love ;)

It got the love it deserved :).

1. What if I want to combine a Collection Transformer (for instance, a Doctrine ArrayCollection into an array of mapped DTOs, in my specific case, API Resources for API Platform) with the 'all properties' UninitializeProxy?

2. Isn't it better to add a depth option to the transformer call itself on a property where we know recursion occurs, like a doctrine relationship, instead of adding a transformer that acts upon all properties? Maybe something like #[Mapper\MaxDepth(int)?

3. Wouldn't it be easier to do this if you split the creation of a target object (and maybe conditionally instantiate a single property, like an ID field of an entity on the target DTO) and the population of a target object (the rest of the properties)? Could a #[Mapper\InitializeProperty] attribute be useful for that?

1. What if I want to combine a Collection Transformer (for instance, a Doctrine ArrayCollection into an array of mapped DTOs, in my specific case, API Resources for API Platform) with the 'all properties' UninitializeProxy?

As the collection transformer just calls ->map on every item, for each of these items if they've an uninitialize proxy it's working like this already.

2. Isn't it better to add a depth option to the transformer call itself on a property where we know recursion occurs, like a doctrine relationship, instead of adding a transformer that acts upon all properties? Maybe something like #[Mapper\MaxDepth(int)?

It's really weird that recursion occurs as we track recursive objects therefore this should not happen. This PR indeed allows to create a IfDepth(3) condition that would prevent any field of mapping after a given depth.

3. Wouldn't it be easier to do this if you split the creation of a target object (and maybe conditionally instantiate a single property, like an ID field of an entity on the target DTO) and the population of a target object (the rest of the properties)? Could a #[Mapper\InitializeProperty] attribute be useful for that?

Exactly and you can already do this, actually this should probably be done for example in API Platform when a property is not readableLink: true. This is already possible but should probably be fixed in the usage of ObjectMapper (as opposed to modifying the symfony component). Not sure to understand #[Mapper\InitializeProperty].

superseeded by #62214