@interface CNCalculatesContactDiff : NSObject + (void)addMultiValueUpdateTo:(id)a0 forProperty:(id)a1 contact1:(id)a2 contact2:(id)a3; + (void)addSingleValueUpdateTo:(id)a0 forProperty:(id)a1 contact1:(id)a2 contact2:(id)a3; + (id)backgroundColorRelatedKeys; + (void)cleanOrphanedCropUpdates:(id)a0 withContact1:(id)a1 contact2:(id)a2; + (void)clearBackgroundColorInUpdates:(id)a0 forContact:(id)a1; + (id)diffContact:(id)a0 to:(id)a1 error:(id *)a2; + (id)imageMetadataLog; + (BOOL)shouldSaveDuplicateProperty:(id)a0 value1:(id)a1 value2:(id)a2; @end