Issue #3236563 by daffie: [Symfony 6] Add "static" type hint to the methods...

Issue #3236563 by daffie: [Symfony 6] Add "static" type hint to the methods overriding Symfony\Component\HttpFoundation\Response::sendContent()

core/modules/big_pipe/src/Render/BigPipeResponse.php

@@ -108,7 +108,7 @@ public function setBigPipeService(BigPipe $big_pipe) {
   /**
    * {@inheritdoc}
    */
-  public function sendContent() {
+  public function sendContent(): static {
     $this->bigPipe->sendContent($this);
 
     // All BigPipe placeholders are processed, so update this response's