title: How to pass by Retrofit Header and Field Maps with Paging Library
body: <p>So, I was looking into the new <a href="https://developer.android.com/topic/libraries/architecture/paging" rel="nofollow noreferrer">paging library</a> by android. It has different components that you need to implement to have it work. Let's say I want to hit an API with retrofit and endlessly scroll with pagination updates. What is the best way to pass by the Header or Field maps to Retrofit considering all the stuff that you need to implement( ViewModel, repository, data source etc)? 
  <a href="https://github.com/googlesamples/android-architecture-components/tree/master/PagingWithNetworkSample" rel="nofollow noreferrer">https://github.com/googlesamples/android-architecture-components/tree/master/PagingWithNetworkSample</a></p>