package com.example.citrusclient.rest; import java.util.Collection; import java.util.HashMap; import retrofit2.Call; import retrofit2.Response; import retrofit2.http.DELETE; import retrofit2.http.Field; import retrofit2.http.FormUrlEncoded; import retrofit2.http.GET; import retrofit2.http.POST; import retrofit2.http.PUT; import retrofit2.http.Path; public interface BooksRest { @GET("accounts/{account_id}/books") Call<Void> getBooks( @Path("account_id") String account_id ); @FormUrlEncoded @POST("accounts/{account_id}/books") Call<Void> createBook( @Path("account_id") String account_id ); }