Make the Apply operation lazy.

spec/drupol/collection/CollectionSpec.php

@@ -69,8 +69,9 @@ public function it_can_apply(): void
         };
 
         $this
+            ->apply($callback)
             ->shouldThrow(\Exception::class)
-            ->during('apply', [$callback]);
+            ->during('all', [$callback]);
 
         $context = [];
 

src/Contract/Applyable.php

@@ -14,7 +14,7 @@ interface Applyable
      *
      * @param callable ...$callables
      *
-     * @return \drupol\collection\Contract\Collection
+     * @return \drupol\collection\Contract\BaseCollection
      */
-    public function apply(callable ...$callables): Collection;
+    public function apply(callable ...$callables): BaseCollection;
 }

src/Operation/Apply.php

@@ -12,18 +12,20 @@ final class Apply extends Operation
     /**
      * {@inheritdoc}
      */
-    public function on(iterable $collection): iterable
+    public function on(iterable $collection): \Closure
     {
-        [$callbacks] = $this->parameters;
+        $callbacks = $this->parameters;
 
-        foreach ($callbacks as $callback) {
-            foreach ($collection as $key => $item) {
-                if (false === $callback($item, $key)) {
-                    break;
+        return static function () use ($callbacks, $collection): iterable {
+            foreach ($callbacks as $callback) {
+                foreach ($collection as $key => $item) {
+                    if (false === $callback($item, $key)) {
+                        break;
+                    }
                 }
             }
-        }
 
-        return $collection;
+            return $collection;
+        };
     }
 }