'returns the keybinding for a specific event.
keySetName - string, name of key binding set
eventStr - string, the virtual event we want the binding for,
represented as a string, eg. \'<<event>>\''

def GetKeyBinding(self, keySetName, eventStr):

    eventName = eventStr[2:(-2)]
    binding = self.GetOption('keys', keySetName, eventName, default='').split()
    return binding
