Enable OneTopLevelClass Checkstyle check
@@ -441,6 +441,10 @@ THE SOFTWARE.
</module>
<module name="UniqueProperties"/>
<module name="TreeWalker">
+ <!--
+ Design: https://checkstyle.sourceforge.io/config_design.html
+ -->
+ <module name="OneTopLevelClass"/>
<!--
Coding: https://checkstyle.sourceforge.io/config_coding.html
-->
