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Dave Dribin  committed 0d16d90

Add +keyPathsForValuesAffectingFirstStartPeriod

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  • Parent commits 4fb8cd5

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 	return [a count] ? [[a objectAtIndex:0] valueForKey:@"start"] : nil;
 }
 
++ (NSSet *)keyPathsForValuesAffectingFirstStartPeriod {
+	return [NSSet setWithObjects:@"periods", nil];
+}
+
 @end