TASK: UnionType::getIterator use yield from

Author: mhsdesign

src/TypeSystem/Type/UnionType/UnionType.php

@@ -106,10 +106,16 @@ public function is(TypeInterface $other): bool
         }
     }
 
-    /** @return \ArrayIterator<int, TypeInterface> */
-    public function getIterator(): \ArrayIterator
+    /** @return \Iterator<int, TypeInterface> */
+    public function getIterator(): \Iterator
     {
-        return new \ArrayIterator($this->members);
+        yield from $this->members;
+    }
+
+    /** @return array<int, TypeInterface> */
+    public function toArray(): array
+    {
+        return $this->members;
     }
 
     public function count(): int

test/Unit/TypeSystem/Type/UnionType/UnionTypeTest.php

@@ -114,8 +114,8 @@ public function unionOnlyHoldsDeduplicatedMembers(): void
         $this->assertCount(count($unionType), $otherUnionType);
 
         $this->assertEqualsCanonicalizing(
-            $unionType->getIterator()->getArrayCopy(),
-            $otherUnionType->getIterator()->getArrayCopy()
+            $unionType->toArray(),
+            $otherUnionType->toArray()
         );
     }