gistfile1.m

// KMLoginResponse inherits from KMReponse
- (void)request:(KMRequest*)request didReceiveResponse:(KMResponse*)theResponse
{
    [request release];
    if ([delegate respondsToSelector:@selector(client:didReceiveResponse:)]) {
        [delegate client:self didReceiveResponse:theResponse];
    }

    // I think this fails as theResponse comes in as a KMResponse
    if ([[KMLoginResponse class] isKindOfClass:[theResponse class]]) {
        KMLoginResponse *r = (KMLoginResponse*)theResponse;
        if ([delegate respondsToSelector:@selector(client:didLoginAsStaff:)]) {
            [delegate client:self didLoginAsStaff:[r currentStaffMember]];
        }
    }
}