psalm.xml

<?xml version="1.0"?>
<psalm
    hideExternalErrors="true"
    errorLevel="1"
    resolveFromConfigFile="true"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="https://getpsalm.org/schema/config"
    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
>
    <projectFiles>
        <directory name="src" />
    </projectFiles>
    <issueHandlers>
        <TooManyArguments>
            <errorLevel type="suppress">
                <!--
                Symfony 4.x to 5.x transition changed the signature to be compatible with PSR.
                Change to SF contracts for SF 5.0 which reintroduces the second parameter.
                -->
                <referencedFunction name="Symfony\Contracts\EventDispatcher\EventDispatcherInterface::dispatch"/>
            </errorLevel>
        </TooManyArguments>
        <DeprecatedClass>
            <errorLevel type="suppress">
                <!--
                Symfony 4.x to 5.x transition deprecated the class to contracts.
                Change to SF contracts for SF 5.0.
                -->
                <referencedClass name="Symfony\Component\EventDispatcher\Event"/>
            </errorLevel>
        </DeprecatedClass>
        <MissingClassConstType>
            <errorLevel type="suppress">
                <file name="src/ContaoEvents.php"/>
                <file name="src/Events/Image/ResizeImageEvent.php"/>
                <file name="src/Events/Message/AddMessageEvent.php"/>
            </errorLevel>
        </MissingClassConstType>
    </issueHandlers>
</psalm>