| HandlerInterface | Debug handler interface |
| AbstractHandler | Debug handler abstract class |
| Exception | Debug handler exception class |
| ExceptionHandler | Debug exception handler class |
| LogHandler | Debug query handler class |
| MemoryHandler | Debug memory handler class |
| MessageHandler | Debug message handler class |
| QueryHandler | Debug query handler class |
| RequestHandler | Debug request handler class |
| TimeHandler | Debug time handler class |