Add stub for Compound::getConstraints()

extension.neon

@@ -96,6 +96,8 @@ parameters:
 		- stubs/Symfony/Component/Serializer/Normalizer/NormalizableInterface.stub
 		- stubs/Symfony/Component/Serializer/Normalizer/NormalizerInterface.stub
 		- stubs/Symfony/Component/Validator/Constraint.stub
+		- stubs/Symfony/Component/Validator/Constraints/Composite.stub
+		- stubs/Symfony/Component/Validator/Constraints/Compound.stub
 		- stubs/Symfony/Component/Validator/ConstraintViolationInterface.stub
 		- stubs/Symfony/Component/Validator/ConstraintViolationListInterface.stub
 		- stubs/Symfony/Contracts/Cache/CacheInterface.stub

stubs/Symfony/Component/Validator/Constraints/Composite.stub

@@ -0,0 +1,9 @@
+<?php
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+
+abstract class Composite extends Constraint
+{
+}

stubs/Symfony/Component/Validator/Constraints/Compound.stub

@@ -0,0 +1,14 @@
+<?php
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+
+abstract class Compound extends Composite
+{
+    /**
+     * @param array<mixed> $options
+     * @return array<Constraint>
+     */
+    abstract protected function getConstraints(array $options): array;
+}