Introduce a custom `ApolloResponse.toString()`

[rohandhruva]

Use case

Since ApolloResponse changed to being a standard class (I think it used to be a data class?), the toString() now is not very useful because it prints the default hashcode / instance code based toString.

Can we introduce a custom toString for ApolloResponse? While printing all of data does not make sense, I'm trying to think what might be useful -- perhaps the cache key?

Describe the solution you'd like

No response

[martinbonnin]

Agreed. This is also recommended by the Kotlin API guidelines. While I wouldn't put toString() on each and every class, ApolloResponse is central enough that it deserves one.

PS: cache key won't be possible because caching belongs to another module (apollo-normalized-cache vs apollo-runtime)