Xcode's Document Items should show protocol name if it's conformed to in an extension

Originator:kevin
Number:rdar://25107962 Date Originated:11-Mar-2016 01:16 PM
Status:Open Resolved:
Product:Developer Tools Product Version:Xcode 7.2.1 (7C1002)
Classification:Enhancement Reproducible:Always
 
This is a duplicate of rdar://25089918

When you conform to a protocol in an extension, e.g.:

extension Movie: CustomStringConvertible {
    var description: String {
        return title
    }
}

and open Document Items (Control-6 keyboard shortcut) it's shown as:

C Movie

It would be better if it could be shown as:

C Movie: CustomStringConvertible

to indicate that this extension is used for protocol conformance.

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