<required>false</required>
          <description>Default plugin information to be made available for reference by projects
            derived from this one. This plugin configuration will not be resolved or bound to the
            lifecycle unless referenced. Any local configuration for a given plugin will override
            the plugin's entire definition here.</description>
          <association>

        {
            boolean found = false;

            for ( Plugin preExisting : getPlugins() )
            {
                if ( preExisting.getPrefix().equals( plugin.getPrefix() ) )
                {
                    found = true;
                    break;
                }
            }

            if ( !found )
            {

          </excludePackageNames>
          <!-- Ignore some tags that are found in Java 11 sources but not recognized... under -source 8, I think it was? I can no longer reproduce the failure. -->
          <tags>
            <tag>
              <name>apiNote</name>
              <placement>X</placement>