/// You can set multiple active mock responses by calling HCMockAddMock() multiple 
/// times with a set of mock responses. If the HTTP call matches against a set mock responses, 
/// they will be executed in order for each subsequent call to HCHttpCallPerformAsync(). When the 
/// last matching mock response is hit, the last matching mock response will be repeated on 
/// each subsequent call to HCHttpCallPerformAsync().