diff --git a/src/Twig/Node/ExampleNode.php b/src/Twig/Node/ExampleNode.php
index 8919ce3..465eb08 100644
--- a/src/Twig/Node/ExampleNode.php
+++ b/src/Twig/Node/ExampleNode.php
@@ -48,6 +48,7 @@ public function compile(Compiler $compiler): void
             $compiler->write('$' . $attributeStorageName . ' = [];' . PHP_EOL);
         }
 
+        // @TODO: drop version check when removing twig < 3.9 support
         if (version_compare(Environment::VERSION, '3.9.0', '>=')) {
             // twig >= 3.9
             $compiler
diff --git a/src/Twig/Node/ExpandNode.php b/src/Twig/Node/ExpandNode.php
index 1b07587..9d54b25 100644
--- a/src/Twig/Node/ExpandNode.php
+++ b/src/Twig/Node/ExpandNode.php
@@ -48,6 +48,7 @@ public function compile(Compiler $compiler)
             $compiler->write('$' . $attributeStorageName . ' = [];' . PHP_EOL);
         }
 
+        // @TODO: drop version check when removing twig < 3.9 support
         if (version_compare(Environment::VERSION, '3.9.0', '>=')) {
             // twig >= 3.9
             $compiler
diff --git a/src/Twig/Node/FrameNode.php b/src/Twig/Node/FrameNode.php
index f644ace..00592c6 100644
--- a/src/Twig/Node/FrameNode.php
+++ b/src/Twig/Node/FrameNode.php
@@ -48,6 +48,7 @@ public function compile(Compiler $compiler): void
             $compiler->write('$' . $attributeStorageName . ' = [];' . PHP_EOL);
         }
 
+        // @TODO: drop version check when removing twig < 3.9 support
         if (version_compare(Environment::VERSION, '3.9.0', '>=')) {
             // twig >= 3.9
             $compiler