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D8 KernelEvents constants

Here is a list of KernelEvents constants: KernelEvents::CONTROLLER ; // The CONTROLLER event occurs once a controller was found for handling a request. KernelEvents::EXCEPTION ; // The EXCEPTION event occurs when an uncaught exception appears. KernelEvents::FINISH_REQUEST ; //The FINISH_REQUEST event occurs when a response was generated for a request. KernelEvents::REQUEST ; // The REQUEST event occurs at the very beginning of request dispatching. KernelEvents::RESPONSE ; // The RESPONSE event occurs once a response was created for replying to a request. KernelEvents::TERMINATE ; // The TERMINATE event occurs once a response was sent. KernelEvents::VIEW ; // The VIEW event occurs when the return value of a controller is not a Response instance.