CheckVoterServiceOneNine.java

/* Synchronous in Retrofit 1.9 */
public interface CheckVoterService {
	@GET("api") 
	Voter searchVoter(
	    @Query("voter_name") String voterName,
	    @QueryMap Map<String, String> optionalQueries
	);
}

/* Asynchronous in Retrofit 1.9 */
public interface CheckVoterService {
	@GET("api") 
	void searchVoter(
	    @Query("voter_name") String voterName,
	    @QueryMap Map<String, String> optionalQueries,
	    Callback<Voter> cb
	);
}