psalm.xml

<?xml version="1.0"?>
<psalm
    errorLevel="7"
    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="functions" />
        <directory name="src" />
        <ignoreFiles>
            <directory name="vendor" />
            <directory name="src/Admin" />
            <directory name="src/Customizer" />
            <directory name="src/Navbar" />
            <directory name="src/Debug" />
        </ignoreFiles>
    </projectFiles>

    <stubs>
        <file name="vendor/php-stubs/wordpress-stubs/wordpress-stubs.php" />
    </stubs>

    <issueHandlers>
        <UndefinedFunction>
            <errorLevel type="suppress">
                <referencedFunction name="new_cmb2_box"/>
            </errorLevel>
        </UndefinedFunction>
        <UndefinedClass>
            <errorLevel type="suppress">
                <referencedClass name="CMB2"/>
            </errorLevel>
        </UndefinedClass>
    </issueHandlers>
</psalm>