@@ -82,7 +82,7 @@ public function each(callable $callback)
8282 */
8383 public function filter (?callable $ callback = null ): CollectionInterface
8484 {
85- $ callback ??= fn ($ v ) => (bool )$ v ;
85+ $ callback ??= fn ($ v ) => (bool )$ v ;
8686
8787 return new FilterIterator ($ this ->unwrap (), $ callback );
8888 }
@@ -92,17 +92,17 @@ public function filter(?callable $callback = null): CollectionInterface
9292 */
9393 public function reject (?callable $ callback = null ): CollectionInterface
9494 {
95- $ callback ??= fn ($ v ) => (bool )$ v ;
95+ $ callback ??= fn ($ v ) => (bool )$ v ;
9696
97- return new FilterIterator ($ this ->unwrap (), fn ($ value , $ key , $ items ) => !$ callback ($ value , $ key , $ items ));
97+ return new FilterIterator ($ this ->unwrap (), fn ($ value , $ key , $ items ) => !$ callback ($ value , $ key , $ items ));
9898 }
9999
100100 /**
101101 * @inheritDoc
102102 */
103103 public function unique (?callable $ callback = null ): CollectionInterface
104104 {
105- $ callback ??= fn ($ v ) => $ v ;
105+ $ callback ??= fn ($ v ) => $ v ;
106106
107107 return new UniqueIterator ($ this ->unwrap (), $ callback );
108108 }
@@ -373,8 +373,8 @@ public function countBy(callable|string $path): CollectionInterface
373373 {
374374 $ callback = $ this ->_propertyExtractor ($ path );
375375
376- $ mapper = fn ($ value , $ key , MapReduce $ mr ) => $ mr ->emitIntermediate ($ value , $ callback ($ value ));
377- $ reducer = fn ($ values , $ key , MapReduce $ mr ) => $ mr ->emit (count ($ values ), $ key );
376+ $ mapper = fn ($ value , $ key , MapReduce $ mr ) => $ mr ->emitIntermediate ($ value , $ callback ($ value ));
377+ $ reducer = fn ($ values , $ key , MapReduce $ mr ) => $ mr ->emit (count ($ values ), $ key );
378378
379379 return $ this ->newCollection (new MapReduce ($ this ->unwrap (), $ mapper , $ reducer ));
380380 }
@@ -877,7 +877,7 @@ public function stopWhen(callable|array $condition): CollectionInterface
877877 */
878878 public function unfold (?callable $ callback = null ): CollectionInterface
879879 {
880- $ callback ??= fn ($ v ) => $ v ;
880+ $ callback ??= fn ($ v ) => $ v ;
881881
882882 return $ this ->newCollection (
883883 new RecursiveIteratorIterator (
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