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What is the difference between outputs and referenced outputs in IB Inspector when connected?

I know that IBOutlet is a compiler directive that indicates that the next variable declaration acts as a connection point to other objects. Two conditions in the inspector window can confuse beginners. They look like 2 kinds of Outlets. But they can mean that they are Outlet and Outlets from other referenced objects. Can anyone who is more knowledgeable confirm this ...

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Sockets are outputs on the object itself. You link them to other objects. Link to sockets - these are outputs on other objects that are connected to the object you are looking at. The new referencing line allows you to draw the connection in the opposite direction.

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Source: https://habr.com/ru/post/1788101/

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