@class NSString, NSArray; @interface WFContactGroup : NSObject <WFNaming> @property (readonly, nonatomic) NSString *name; @property (readonly, nonatomic) NSArray *contacts; @property (readonly, copy, nonatomic) NSString *wfName; + (id)allContactGroups; + (id)contactGroupWithName:(id)a0; + (Class)preferredConcreteSubclass; - (BOOL)containsContact:(id)a0; @end