install
fun install(builder: ERROR CLASS: Symbol not found for OkHttpClient.Builder): ERROR CLASS: Symbol not found for OkHttpClient.Builder
Adds Retrostash's interceptors to builder. Returns builder for chaining.
Order matters: the handle interceptor must precede the cache interceptor so from can recover this bridge from a built OkHttpClient.
Caching strategy: if builder also has cache(...) set, you have two cache layers (Retrostash store + OkHttp HTTP cache). Retrostash invalidation does not evict OkHttp HTTP cache entries — see Caching strategy for the recommended configuration.