such as @ Header annotation on Retrofit
You can achieve this with okhttp interceptor. Any reason you need the feature to also be in apollo? https://futurestud.io/tutorials/retrofit-2-manage-request-headers-in-okhttp-interceptor
I wanna use with DI containner such as Dagger2. (´・ω・`)
I'm not sure what you mean. Dagger has nothing to do with headers. Closing as this is not a bug report nor do I believe any work needs to be done