<!-- allows suppressing using the //CHECKSTYLE:ON //CHECKSTYLE:OFF -->
        <module name="SuppressionCommentFilter"/>
        <!-- to enable SuppressWarningsFilter -->
        <module name="SuppressWarningsHolder"/>
    </module>
    <module name="RegexpHeader">
        <property name="headerFile" value="${config_loc}/required-header.txt"/>
    </module>
    <module name="FileTabCharacter"/>