public StoryHandlerListener
To listen before and after action handling.
Need to be registered using ai.tock.bot.engine.BotRepository.registerStoryHandlerListener.
boolean startAction(@NotNull
BotBus botBus,
@NotNull
StoryHandler handler)
Called before StoryHandler.handle.
If it returns false, the interface StoryHandlerListeners registered after this listener
and the interface StoryHandler are not called.
(however endAction of each interface StoryHandlerListener is called].
void endAction(@NotNull
BotBus botBus,
@NotNull
StoryHandler handler)
Called when interface StoryHandler handling is over.
interface StoryHandler