We shouldn't use jdk.internal types.
                
                com.beust and org.testng.collections has classes that look like Guava.

                We prefer to import javax.annotation and fully-qualify references to org.jetbrains.annotations.
            -->
            <property name="illegalPkgs" value="jdk.internal,com.beust,org.testng.collections,org.jetbrains.annotations"/>