handlers Of
Obtains methods for handling messages of the given class and with the given origin.
If there is no handler matching both the message and origin class, handlers will be searched by the message class only.
If no handlers for a specified criteria is found, returns an empty set.
Parameters
message Class
the message class of the handled message
origin Class
the class of the message, from which the handled message is originate
Obtains methods for handling messages of the given class.
Return
handlers method
Parameters
message Class
the message class of the handled message