I assume that just because I can toll-free bridge something
between core foundation and NSFoo I still have to worry about
CFretain/CFrelease in a GC app.  Correct?

Example:

Assume image is an CGImageSourceRef.

    NSDictionary *metadata =
        (NSDictionary *) CGImageSourceCopyPropertiesAtIndex(image, 0, NULL);
    ....
    CFRelease((CFDictionaryRef) metadata);

or alternately

    NSDictionary *metadata = (NSDictionary *)
        NSMakeCollectable(CGImageSourceCopyPropertiesAtIndex(image, 0, NULL));

Is that correct?

/\/\arc

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