{@code META-INF/maven/lifecycle.xml} in a plugin's jar artifact.
  </description>
  <classes>
    <class rootElement="true" xml.tagName="lifecycles" xsd.compositor="sequence">
      <name>LifecycleConfiguration</name>
      <version>1.0.0</version>
      <description>Root element of the {@code lifecycle.xml} file.</description>
      <fields>
        <field>

            return sourceLevel;
        }
                ]]>
          </code>
        </codeSegment>
      </codeSegments>
    </class>
    <class rootElement="true" xml.tagName="toolchains" xsd.compositor="sequence">
      <name>PersistedToolchains</name>
      <superClass>TrackableBase</superClass>
      <description>
        The {@code &lt;toolchains&gt;} element is the root of the descriptor.