psalm.xml

<?xml version="1.0"?>
<psalm
    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"/>
        <ignoreFiles>
            <directory name="src/Resources"/>
        </ignoreFiles>
    </projectFiles>
    <issueHandlers>
        <PropertyNotSetInConstructor>
            <errorLevel type="suppress">
                <!-- Ignore uninitialized inherited properties from Contao Widget -->
                <referencedProperty name="Contao\TemplateInheritance::$strParent"/>
                <referencedProperty name="Contao\TemplateInheritance::$strDefault"/>
                <referencedProperty name="Contao\Widget::$strId"/>
                <referencedProperty name="Contao\Widget::$strName"/>
                <referencedProperty name="Contao\Widget::$strLabel"/>
                <referencedProperty name="Contao\Widget::$inputCallback"/>
                <referencedProperty name="Contao\Widget::$strPrefix"/>
                <referencedProperty name="Contao\Widget::$strWizard"/>
                <referencedProperty name="Contao\Widget::$objDca"/>
                <referencedProperty name="Contao\Widget::$strClass"/>
            </errorLevel>
        </PropertyNotSetInConstructor>
        <PossiblyNullArgument>
            <errorLevel type="suppress">
                <referencedFunction name="Contao\Widget::addAttributes"/>
            </errorLevel>
        </PossiblyNullArgument>
        <MixedAssignment>
            <errorLevel type="suppress">
                <file name="vendor/contao/core-bundle/contao/library/Contao/Widget.php"/>
            </errorLevel>
        </MixedAssignment>
    </issueHandlers>
</psalm>