<association>
            <type>ActivationFile</type>
          </association>
        </field>
        <field>
          <name>packaging</name>
          <version>4.1.0+</version>
          <type>String</type>
          <description>Specifies that this profile will be activated based on the project's packaging.</description>

                     Error Prone doesn't know it's building test code unless we
                     pass -XepCompilingTestOnlyCode, and that argument needs to
                     be passed as part of the same <arg> as -Xplugin:ErrorProne,
                     and I gave up trying to figure out how to do that for test
                     compilation only. -->