where to put exposeBinding(_:) since initialize is not permitted?

I have a custom view I want to expose bindings for, but I have no idea where to expose the bindings – every tutorial, and even the documentation, says this is "is typically invoked in the class’s

initialize
implementation", but as of Swift 3.1, apparently, this is no longer allowed.
where to put exposeBinding(_:) since initialize is not permitted?
 
 
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