Let's say I need to map class Source to class Destination with an interface of the mapstruct.

@Mapper
public interface MyMapper {

   @Mapping(target = "attribute1", source = "attribute1")
   Destination toDestination(Source source);
}

If class Destination has two constructors, a compile error will occur:

"Ambiguous constructors found for creating Destination ..."

If the attribute1 of the Destination class doesn't have its setter, another compile error will occur:

"Unknown property"

So, how exactly does the mapper map class attributes?