skip iterable already there

rules-tests/TypeDeclaration/Rector/FunctionLike/AddReturnTypeDeclarationFromYieldsRector/Fixture/skip_return_type_iterable.php.inc

@@ -0,0 +1,16 @@
+<?php
+
+namespace Rector\Tests\TypeDeclaration\Rector\FunctionLike\AddReturnTypeDeclarationFromYieldsRector\Fixture;
+
+final class SkipReturnTypeIterable
+{
+    public function run(): iterable
+    {
+        yield from $this->getData();
+    }
+
+    private function getData(): array
+    {
+        return [];
+    }
+}

rules/TypeDeclaration/Rector/FunctionLike/AddReturnTypeDeclarationFromYieldsRector.php

@@ -98,7 +98,7 @@ public function refactorWithScope(Node $node, Scope $scope): ?Node
         // skip already filled type
         if ($node->returnType instanceof Node && $this->isNames(
             $node->returnType,
-            ['Iterator', 'Generator', 'Traversable']
+            ['Iterator', 'Generator', 'Traversable', 'iterable']
         )) {
             return null;
         }