Greetings:

I am drawing a blank here, and am trying to think of how to create an 
EOSortOrdering across a key path.  

I have an entity Booking which has one date and one Performance.  Performance 
is an entity which has one PerformanceType.  PerformanceType is an entity which 
has a name attribute (a String).  I want to sort the results of a fetch by the 
date and by name of the Performance's Performance type.  The date is pretty 
obvious, but the Performance type is confusing me.  So how would I create a 
sort ordering for an array of Bookings to sort based on the key path 
aBooking.performance.performanceType.name.

Any ideas would be appreciated.  This seems like it should be obvious, but I'm 
drawing a blank.

Andrew
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