private final String v3Phase;
        private final String v4Phase;

        DefaultAlias(String v3Phase, String v4Phase) {
            this.v3Phase = v3Phase;
            this.v4Phase = v4Phase;
        }

        @Override
        public String v3Phase() {
            return v3Phase;
        }

        @Override
        public String v4Phase() {
            return v4Phase;
        }

                    Lifecycle original = phaseToLifecycleMap.put(alias.v3Phase(), lifecycle);
                    if (original != null && logger.isWarnEnabled()) {
                        logger.warn(
                                "Duplicated lifecycle phase {}. Defined in {} but also in {}",
                                alias.v3Phase(),
                                original.getId(),

         * Returns the Maven 3 phase name.
         *
         * @return the Maven 3 phase name
         */
        String v3Phase();

        /**
         * Returns the Maven 4 phase name.
         *
         * @return the Maven 4 phase name
         */
        String v4Phase();
    }

    /**
     * A link from a phase to another phase, consisting of a type which can be

                    .filter(a -> phase.equals(a.v3Phase()))
                    .findFirst()
                    .map(Lifecycle.Alias::v4Phase)
                    .orElse(phase);
        }

        private String getResolvedPhase(String phase) {
            return lifecycles.stream()
                    .flatMap(l -> l.aliases().stream())
                    .filter(a -> phase.equals(a.v3Phase()))
                    .findFirst()

                new TreeMap<>(new PhaseComparator(lifecycle.getPhases()));

        Map<String, String> aliases = lifecycle.getDelegate().aliases().stream()
                .collect(Collectors.toMap(a -> a.v3Phase(), a -> a.v4Phase()));

        if (aliases.containsKey(lifecyclePhase)) {
            lifecyclePhase = PhaseId.of(aliases.get(lifecyclePhase)).phase();
        }

        boolean passed = false;

                    .flatMap(l -> l.getDelegate().aliases().stream())
                    .filter(a -> phase.getId().equals(a.v3Phase()))
                    .findFirst()
                    .map(a -> a.v4Phase())
                    .orElse(phase.getId());

            List<MojoExecution> forkedExecutions = lifecycleMappings.get(phaseId);

            if (forkedExecutions != null) {

    }

    @Override
    public List<String> computePhases(Lifecycle lifecycle) {
        Graph graph = new Graph();
        addPhases(graph, null, null, lifecycle.v3phases());
        List<String> allPhases = graph.visitAll();
        Collections.reverse(allPhases);
        List<String> computed =
                allPhases.stream().filter(s -> !s.startsWith("$")).collect(Collectors.toList());