If it returned a “Foo”, whose structure changes in such a way as to requires changes in all places it was used…
That, sounds to me like a disaster you avoided by being helped (which is the polite way to describe developers not getting away with ignoring lazy and dangerous type conversion bugs) to fix each and every usage of it.
If it returned a “Foo”, whose structure changes in such a way as to requires changes in all places it was used…
That, sounds to me like a disaster you avoided by being helped (which is the polite way to describe developers not getting away with ignoring lazy and dangerous type conversion bugs) to fix each and every usage of it.
No, there’s countless ways code could be consuming a Foo or Bar and not care which.
Literally any form of serialization won’t care, for example.
Also you can change from a Foo to a Bar in a non breaking manner, where it’s name changed but the still have the same interface.