local Event = class("Event")
function Event:ctor(listener, callback)
	self._listener = listener
	if type(callback) == "function" then
		self._callback = callback
	elseif type(callback) == "string" then
		local cb = listener[callback]
		if type(cb) == "function" then
			self._callback = cb
		else
			self._callback = nil
		end
	else
		self._callback = nil
	end
end
return Event