<NME> ReturnTypeHintedClass.php
<BEF> <?php

namespace ZendTest\Code\TestAsset;

class ReturnTypeHintedClass
{
    public function voidReturn() : void
    {
    }

    public function arrayReturn() : array
    {
    }

    public function callableReturn() : callable
    {
    }

    public function intReturn() : int
    {
    }

    public function floatReturn() : float
    {
    }

    public function stringReturn() : string
    {
    }

    public function boolReturn() : bool
    {
    }

    public function selfReturn() : self
    {
    }

    public function classReturn() : ReturnTypeHintedClass
    {
    }

    public function otherClassReturn() : InternalHintsClass
    {
    }
}

<MSG> Adding `parent` hint to `ReturnTypeHintedClass`

<DFF> @@ -2,7 +2,7 @@
 
 namespace ZendTest\Code\TestAsset;
 
-class ReturnTypeHintedClass
+class ReturnTypeHintedClass extends EmptyClass
 {
     public function voidReturn() : void
     {
@@ -36,6 +36,10 @@ class ReturnTypeHintedClass
     {
     }
 
+    public function parentReturn() : parent
+    {
+    }
+
     public function classReturn() : ReturnTypeHintedClass
     {
     }

Adding `parent` hint to `ReturnTypeHintedClass`