SQL Developer 17.4.0 cannot display the content. In most cases SQL Developer freezes partially (Navigator and code editor of wrapped unit). No problems in 17.3.1.
No client can display wrapped code because it is essentially 'encrypted'. There is no source code in the dictionary that can possibly be displayed.
So what do you mean by No problems in 17.3.1?
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Thanks for the image.
That would be a bug. It should at least show the signature of the code.
I can also reproduce this this bug in 17.4.0
Thanks for reporting this. Same behavior on WIndows 10.
The developer has already logged a bug against SQL Developer's SQL Formatter component.