refactor new usages

Author: canvural

src/Type/Php/ArrayCountValuesDynamicReturnTypeExtension.php

@@ -10,7 +10,6 @@
 use PHPStan\Type\ArrayType;
 use PHPStan\Type\Constant\ConstantArrayType;
 use PHPStan\Type\DynamicFunctionReturnTypeExtension;
-use PHPStan\Type\ErrorType;
 use PHPStan\Type\IntegerRangeType;
 use PHPStan\Type\Type;
 use PHPStan\Type\TypeCombinator;
@@ -49,11 +48,11 @@ public function getTypeFromFunctionCall(
 
 			if ($itemType instanceof UnionType) {
 				$itemType = $itemType->filterTypes(
-					static fn ($type) => !$type->toArrayKey() instanceof ErrorType,
+					static fn ($type) => $type->toArrayKey()->isError()->no(),
 				);
 			}
 
-			if ($itemType->toArrayKey() instanceof ErrorType) {
+			if (!$itemType->toArrayKey()->isError()->no()) {
 				continue;
 			}