combine spotbugs filter for Source and Bug together

Question

when running spot bugs against a Jenkins Shared Library, I want to relax a rule for all files beneath the vars/ directory as they will be lowercase "Class" files".

using <Bug pattern="NM_CLASS_NAMING_CONVENTION" /> or <Source name="vars/*"/> alone works but I cannot figure out how to combine them

Using <And> or not using it results in the errors showing.

<FindBugsFilter>
    <Match>
        <And>
            <Bug pattern="NM_CLASS_NAMING_CONVENTION" />
            <Source name="vars/*"/>
        </And>
    </Match>
</FindBugsFilter>

Is it possible to combine Source + Bug in a match?