isMigrationStep example

return ['Event subscribers must be flagged @internal or @final to not be captured by the BC checker.'];
        }

        if ($namespace = $this->isInInternalNamespace($node)) {
            return ['Classes in `' . $namespace . '` namespace must be flagged @internal to not be captured by the BC checker.'];
        }

        if ($this->isInNamespace($node, '\\Framework\\Demodata') && !\in_array($class, self::DEMO_DATA_EXCEPTIONS, true)) {
            return ['Classes in `Framework\\Demodata` namespace must be flagged @internal to not be captured by the BC checker.'];
        }

        if ($this->isMigrationStep($node)) {
            return ['Migrations must be flagged @internal to not be captured by the BC checker.'];
        }

        if ($this->isMessageHandler($node) && !\in_array($class, self::MESSAGE_HANDLER_EXCEPTIONS, true)) {
            return ['MessageHandlers must be flagged @internal to not be captured by the BC checker.'];
        }

        if ($this->isParentInternalAndAbstract($scope) && !$this->isFinal($node->getClassReflection(), $doc)) {
            return ['Classes that extend an @internal abstract class must be flagged @internal or @final to not be captured by the BC checker.'];
        }