* that callers don't pass an {@link Entry} by mistake.
   */
  protected V get(K key) {
    return getMap().get(key);
  }

  protected final K k0() {
    return e0().getKey();
  }

  protected final V v0() {
    return e0().getValue();
  }

  protected final K k1() {
    return e1().getKey();
  }

  protected final V v1() {
    return e1().getValue();
  }

        // TODO
    }

    protected Object getDependencyKey(Dependency dependency) {
        return dependency;
    }

    protected Object getPluginKey(Plugin plugin) {
        return plugin;
    }

    protected Object getPluginExecutionKey(PluginExecution pluginExecution) {
        return pluginExecution;
    }

    protected Object getReportPluginKey(ReportPlugin reportPlugin) {

  protected Collection<Method> suppressForHashMap() {
    return emptySet();
  }

  protected Collection<Method> suppressForHashtable() {
    return emptySet();
  }

  protected Collection<Method> suppressForLinkedHashMap() {
    return emptySet();
  }

  protected Collection<Method> suppressForTreeMapNatural() {
    return emptySet();
  }

  protected Collection<Method> suppressForTreeMapWithComparator() {

 */
@Deprecated(since = "4.0.0")
class FileToRawModelMerger extends MavenMerger {

    @Override
    protected void mergeBuild_Extensions(
            Build.Builder builder, Build target, Build source, boolean sourceDominant, Map<Object, Object> context) {
        // don't merge
    }

    @Override
    protected void mergeBuildBase_Resources(
            BuildBase.Builder builder,
            BuildBase target,

    }

    @Override
    protected void shutDown() {
      assertTrue(startUpCalled);
      assertTrue(runCalled);
      assertFalse(shutDownCalled);
      shutDownCalled = true;
      assertEquals(expectedShutdownState, state());
    }

    @Override
    protected void triggerShutdown() {
      exitRun.countDown();
    }

    @Override
    protected Executor executor() {

                }
              });
        }

        @Override
        protected void doStop() {
          triggerShutdown();
        }

        @Override
        public String toString() {
          return AbstractExecutionThreadService.this.toString();
        }
      };

  /** Constructor for use by subclasses. */
  protected AbstractExecutionThreadService() {}

  /**

                classWorld.close();
            }
        }
    }

    protected MessageBuilderFactory createMessageBuilderFactory() {
        return new JLineMessageBuilderFactory();
    }

    protected abstract Invoker createInvoker();

    protected abstract Parser createParser();

    protected abstract ParserRequest.Builder createParserRequestBuilder(String[] args);

    // fields -----------------------------------------------------------------

    protected Artifact a1;

    protected Artifact a2;

    protected Artifact b1;

    private final String roleHint;

    @Inject
    private ArtifactFactory artifactFactory;

    private ConflictResolver conflictResolver;

    @Inject
    protected PlexusContainer container;

        return new DefaultModelReader();
    }

    protected ProfileSelector newProfileSelector() {
        DefaultProfileSelector profileSelector = new DefaultProfileSelector();

        for (ProfileActivator activator : newProfileActivators()) {
            profileSelector.addProfileActivator(activator);
        }

        return profileSelector;
    }

   *     that involve a null element being present.
   */
  protected int getNullLocation() {
    return getNumElements() / 2;
  }

  protected MinimalCollection<E> createDisjointCollection() {
    return MinimalCollection.of(e3(), e4());
  }

  protected MinimalCollection<E> emptyCollection() {
    return MinimalCollection.of();
  }

  protected final E e0() {
    return samples.e0();
  }