[9.x] Widen the type of Collection::unique $key parameter

src/Illuminate/Collections/Collection.php

@@ -1528,7 +1528,7 @@ public function undot()
     /**
      * Return only unique items from the collection array.
      *
-     * @param  (callable(TValue, TKey): bool)|string|null  $key
+     * @param  (callable(TValue, TKey): mixed)|string|null  $key
      * @param  bool  $strict
      * @return static
      */

src/Illuminate/Collections/Enumerable.php

@@ -1114,7 +1114,7 @@ public function undot();
     /**
      * Return only unique items from the collection array.
      *
-     * @param  (callable(TValue, TKey): bool)|string|null  $key
+     * @param  (callable(TValue, TKey): mixed)|string|null  $key
      * @param  bool  $strict
      * @return static
      */
@@ -1123,7 +1123,7 @@ public function unique($key = null, $strict = false);
     /**
      * Return only unique items from the collection array using strict comparison.
      *
-     * @param  (callable(TValue, TKey): bool)|string|null  $key
+     * @param  (callable(TValue, TKey): mixed)|string|null  $key
      * @return static
      */
     public function uniqueStrict($key = null);

src/Illuminate/Collections/LazyCollection.php

@@ -1464,7 +1464,7 @@ public function undot()
     /**
      * Return only unique items from the collection array.
      *
-     * @param  (callable(TValue, TKey): bool)|string|null  $key
+     * @param  (callable(TValue, TKey): mixed)|string|null  $key
      * @param  bool  $strict
      * @return static
      */

src/Illuminate/Collections/Traits/EnumeratesValues.php

@@ -818,7 +818,7 @@ public function tap(callable $callback)
     /**
      * Return only unique items from the collection array.
      *
-     * @param  (callable(TValue, TKey): bool)|string|null  $key
+     * @param  (callable(TValue, TKey): mixed)|string|null  $key
      * @param  bool  $strict
      * @return static
      */
@@ -840,7 +840,7 @@ public function unique($key = null, $strict = false)
     /**
      * Return only unique items from the collection array using strict comparison.
      *
-     * @param  (callable(TValue, TKey): bool)|string|null  $key
+     * @param  (callable(TValue, TKey): mixed)|string|null  $key
      * @return static
      */
     public function uniqueStrict($key = null)

src/Illuminate/Database/Eloquent/Collection.php

@@ -458,7 +458,7 @@ public function intersect($items)
     /**
      * Return only unique items from the collection.
      *
-     * @param  (callable(TModel, TKey): bool)|string|null  $key
+     * @param  (callable(TModel, TKey): mixed)|string|null  $key
      * @param  bool  $strict
      * @return static<int, TModel>
      */

types/Database/Eloquent/Collection.php

@@ -135,7 +135,7 @@
     assertType('User', $user);
     assertType('int', $int);
 
-    return true;
+    return $user->getTable();
 }));
 assertType('Illuminate\Database\Eloquent\Collection<int, User>', $collection->unique('string'));
 

types/Support/Collection.php

@@ -747,21 +747,21 @@
     assertType('User', $user);
     assertType('int', $int);
 
-    return true;
+    return $user->getTable();
 }));
 assertType('Illuminate\Support\Collection<string, string>', $collection->make(['string' => 'string'])->unique(function ($stringA, $stringB) {
     assertType('string', $stringA);
-    assertType('string', $stringA);
+    assertType('string', $stringB);
 
-    return false;
+    return $stringA;
 }, true));
 
 assertType('Illuminate\Support\Collection<int, User>', $collection->uniqueStrict());
 assertType('Illuminate\Support\Collection<int, User>', $collection->uniqueStrict(function ($user, $int) {
     assertType('User', $user);
     assertType('int', $int);
 
-    return true;
+    return $user->getTable();
 }));
 
 assertType('Illuminate\Support\Collection<int, User>', $collection->values());

types/Support/LazyCollection.php

@@ -745,21 +745,21 @@
     assertType('User', $user);
     assertType('int', $int);
 
-    return true;
+    return $user->getTable();
 }));
 assertType('Illuminate\Support\LazyCollection<string, string>', $collection->make(['string' => 'string'])->unique(function ($stringA, $stringB) {
     assertType('string', $stringA);
-    assertType('string', $stringA);
+    assertType('string', $stringB);
 
-    return false;
+    return $stringA;
 }, true));
 
 assertType('Illuminate\Support\LazyCollection<int, User>', $collection->uniqueStrict());
 assertType('Illuminate\Support\LazyCollection<int, User>', $collection->uniqueStrict(function ($user, $int) {
     assertType('User', $user);
     assertType('int', $int);
 
-    return true;
+    return $user->getTable();
 }));
 
 assertType('Illuminate\Support\LazyCollection<int, User>', $collection->values());