assertEquals(p.getRepositories().size(), clone.getRepositories().size());
        // TODO deep compare the lists
        assertEquals(
                p.getPluginRepositories().size(), clone.getPluginRepositories().size());
        // TODO deep compare the lists
    }

    <T> void set(@Nonnull Key<T> key, @Nullable T value);

    /**
     * Associates the specified session data with the given key if the key is currently mapped to the given value. This
     * method provides an atomic compare-and-update of some key's value.
     *
     * @param key the key under which to store the session data, must not be {@code null}
     * @param oldValue the expected data currently associated with the key, may be {@code null}

          <name>priority</name>
          <version>4.0.0/4.0.99</version>
          <type>int</type>
          <description>
            <![CDATA[
            The priority of this execution compared to other executions which are bound to the same phase.
            <p><strong>Warning:</strong> This is an internal utility property that is only public for technical reasons,

                    "must be one of " + validVersions + " but is '" + string + "'.",
                    tracker);
        }

        return false;
    }

    /**
     * Compares two model versions.
     *
     * @param first the first version.
     * @param second the second version.