pages.

          This flag does not exist on 9-10 and 13+ (https://bugs.openjdk.java.net/browse/JDK-8215582).

          Consider removing it once our release and test scripts are migrated to a recent JDK (17+).
       -->
      <id>javadocs-jdk11-12</id>
      <activation>
        <jdk>[11,13)</jdk>
      </activation>
      <properties>

            classes that are actually used in the module under test.

            One way to eliminate the warnings is to make base.testModule include the not really
            necessary <inherits> lines for c.g.c.collect.testModule, etc. However, adding <inherits>
            lines could make c.g.c.base.testModule transitively inherit from extra modules. If some