Issue #3374878 by Spokje: Fix PHPStan L1 errors "Offset 'foo' on array{} in...

Issue #3374878 by Spokje: Fix PHPStan L1 errors "Offset 'foo' on array{} in isset() does not exist."

(cherry picked from commit 985b1efa)

core/modules/views/tests/src/Kernel/Handler/AreaDisplayLinkTest.php

@@ -308,7 +308,9 @@ public function testAreaDisplayLink() {
   protected function assertFormOptions(ViewExecutable $view, string $display_link_id): void {
     $form = [];
     $form_state = new FormState();
-    $view->display_handler->getHandler('header', $display_link_id)->buildOptionsForm($form, $form_state);
+    /** @var \Drupal\views\Plugin\views\area\DisplayLink $display_handler */
+    $display_handler = $view->display_handler->getHandler('header', $display_link_id);
+    $display_handler->buildOptionsForm($form, $form_state);
     $this->assertTrue(isset($form['display_id']['#options']['page_1']));
     $this->assertTrue(isset($form['display_id']['#options']['page_2']));
     $this->assertFalse(isset($form['display_id']['#options']['block_1']));

core/modules/views/tests/src/Kernel/Handler/AreaEntityTest.php

@@ -179,7 +179,9 @@ public function doTestRender($entities) {
     $form = [];
     $form_state = (new FormState())
       ->set('type', 'header');
-    $view->display_handler->getHandler('header', 'entity_entity_test')->buildOptionsForm($form, $form_state);
+    /** @var \Drupal\views\Plugin\views\area\DisplayLink $display_handler */
+    $display_handler = $view->display_handler->getHandler('header', 'entity_entity_test');
+    $display_handler->buildOptionsForm($form, $form_state);
     $this->assertTrue(isset($form['view_mode']['#options']['test']), 'Ensure that the test view mode is available.');
     $this->assertTrue(isset($form['view_mode']['#options']['default']), 'Ensure that the default view mode is available.');
   }

core/phpstan-baseline.neon

@@ -2540,16 +2540,6 @@ parameters:
 			count: 2
 			path: modules/views/tests/src/FunctionalJavascript/ClickSortingAJAXTest.php
 
-		-
-			message: "#^Offset 'display_id' on array\\{\\} in isset\\(\\) does not exist\\.$#"
-			count: 1
-			path: modules/views/tests/src/Kernel/Handler/AreaDisplayLinkTest.php
-
-		-
-			message: "#^Offset 'view_mode' on array\\{\\} in isset\\(\\) does not exist\\.$#"
-			count: 1
-			path: modules/views/tests/src/Kernel/Handler/AreaEntityTest.php
-
 		-
 			message: "#^Call to deprecated constant REQUEST_TIME\\: Deprecated in drupal\\:8\\.3\\.0 and is removed from drupal\\:11\\.0\\.0\\. Use \\\\Drupal\\:\\:time\\(\\)\\-\\>getRequestTime\\(\\); $#"
 			count: 3