Notifications

https://developer.apple.com/reference/foundation/nsnotificationcenter

You should do the following:

1. Create a branch from develop called feature/notifications
2. Add “Randomize order” button to OrganizationInfoViewController. It should randomize the order of employees in an organization.
3. Declare kEmployeesOrderHasChanged string constant.
4. Implement a logic of reloading table view on MainViewController after randomizing order in OrganizationViewController with the help of NSNotificationCenter.
5. Create a pull request from your branch to develop.

You should be able to answer the following questions:

• What is NSNotificationCenter?
• What is the difference between delegation and notifications patterns?
• How to unsubscribe from notifications? How and when should it be used? Is it mandatory?