function Promise.prototype.andThenReturn(r,...)local i,j=pack(...)return r:_andThen(debug.traceback(nil,2),function()return unpack(j,1,i)end)end
--[[
	Shorthand for an andThen handler that returns the given value.
]]
function Promise.prototype:andThenReturn(...)
	local length, values = pack(...)
	return self:_andThen(debug.traceback(nil, 2), function()
		return unpack(values, 1, length)
	end)
end
