IntelliJ don't recognise implicit imports as usefull

Question

I use spray json in my application and for models I need to write JsonProtocol companions.

Because in the service I have more models, I have two options to use these JsonProtocols:

a) make TableauErrorResponseJsonProtocol a trait and extend it by my service

b) make TableauErrorResponseJsonProtocol an object and import it where I need in my service (as in picture)

I try to avoid using option a) because I already have some extends for my service, so I don't want to use with x, with y, with z, ....

But, for option b), when I want to rearrange the code (CTRL + ALT + SHIFT + L), IntelliJ will remove all these imports, because are "unused". In reallity, these both are used by the next line (response.data.parseJson.convertTo[MyClass]).

How I can avoid it? thanks

Answer 1

Alt + Enter on the import . And you will see an option like Mark import as always used in this project