Do benevolent union for SimpleXMLElement::children()

Author: ondrejmirtes

resources/functionMap.php

@@ -10227,7 +10227,7 @@
 'SimpleXMLElement::addChild' => ['static', 'name'=>'string', 'value='=>'string|null', 'ns='=>'string|null'],
 'SimpleXMLElement::asXML' => ['string|bool', 'filename='=>'string'],
 'SimpleXMLElement::attributes' => ['static|null', 'ns='=>'string', 'is_prefix='=>'bool'],
-'SimpleXMLElement::children' => ['static|null', 'namespaceOrPrefix='=>'string|null', 'is_prefix='=>'bool'],
+'SimpleXMLElement::children' => ['__benevolent<static|null>', 'namespaceOrPrefix='=>'string|null', 'is_prefix='=>'bool'],
 'SimpleXMLElement::count' => ['0|positive-int'],
 'SimpleXMLElement::getDocNamespaces' => ['string[]|false', 'recursive='=>'bool', 'from_root='=>'bool'],
 'SimpleXMLElement::getName' => ['string'],

tests/PHPStan/Rules/Methods/CallMethodsRuleTest.php

@@ -395,10 +395,6 @@ public function testCallMethods(): void
 				'Parameter #1 $callable of method Test\\MethodExists::doBar() expects callable(): mixed, array{object, \'bar\'} given.',
 				921,
 			],
-			[
-				'Cannot call method count() on SimpleXMLElement|null.',
-				941,
-			],
 			[
 				'Parameter #1 $namespaceOrPrefix of method SimpleXMLElement::children() expects string|null, int given.',
 				942,