Add example for arg checking
Add example for arg checking

Hansoft/meteor,Hansoft/meteor,RocketChat/Rocket.Chat.Docs,robfallows/guide,Hansoft/meteor,kvetoslavnovak/GitBook-Meteor-Guide,RocketChat/Rocket.Chat.Docs,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,RocketChat/Rocket.Chat.Docs,heytz/guide,Hansoft/meteor,RocketChat/Rocket.Chat.Docs