psalm.xml

<?xml version="1.0"?>
<psalm
    errorLevel="4"
    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="vendor" />
        </ignoreFiles>
    </projectFiles>
    <issueHandlers>
        <UndefinedAttributeClass>
            <errorLevel type="suppress">
                <referencedClass name="JetBrains\PhpStorm\ExpectedValues" />
                <referencedClass name="JetBrains\PhpStorm\Deprecated" />
                <referencedClass name="JetBrains\PhpStorm\Pure" />
            </errorLevel>
        </UndefinedAttributeClass>
        <UndefinedClass>
            <errorLevel type="suppress">
                <referencedClass name="BackedEnum" />
            </errorLevel>
        </UndefinedClass>
    </issueHandlers>
</psalm>