return new UpgradeResult(mergedProcessed, mergedModified, mergedErrors);
    }

    /**
     * Returns true if no errors occurred.
     */
    public boolean success() {
        return errorPoms.isEmpty();
    }

    /**
     * Returns the number of POMs processed.
     */
    public int processedCount() {
        return processedPoms.size();
    }

    /**
     * Returns the number of POMs modified.

        assertEquals("", myConfig.prefix());
        assertEquals("myConfig", myConfig.name());
        String config = node.toString();
        assertFalse(config.isEmpty(), "Expected collection to not be empty but was empty");
    }

    String toXml(Model model) throws IOException, XMLStreamException {
        StringWriter sw = new StringWriter();

  }

  public void testAsMapEmpty() {
    Set<String> strings = ImmutableSet.of();
    Map<String, Integer> map = Maps.asMap(strings, LENGTH_FUNCTION);
    assertThat(map.entrySet()).isEmpty();
    assertTrue(map.isEmpty());
    assertThat(map.get("five")).isNull();
  }

  private static class NonNavigableSortedSet extends ForwardingSortedSet<String> {
    private final SortedSet<String> delegate = Sets.newTreeSet();

  @CollectionSize.Require(ONE)
  public void testValuesIteratorRemove() {
    Iterator<V> valuesItr = multimap().values().iterator();
    valuesItr.next();
    valuesItr.remove();
    assertTrue(multimap().isEmpty());
  }

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  public void testClear() {
    collection.clear();
    assertTrue("After clear(), a collection should be empty.", collection.isEmpty());
    assertEquals(0, collection.size());
    assertFalse(collection.iterator().hasNext());
  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  @CollectionSize.Require(absent = ZERO)

            path.append(ARTIFACT_SEPARATOR).append(artifact.getClassifier());
        }

        if (artifactHandler.getExtension() != null
                && !artifactHandler.getExtension().isEmpty()) {
            path.append(GROUP_SEPARATOR).append(artifactHandler.getExtension());
        }

        return path.toString();
    }

    @Override

                    .append(" (")
                    .append(localRepository.getBasedir())
                    .append(")");
        }

        if (remoteRepositories != null && !remoteRepositories.isEmpty()) {
            for (RemoteRepository repository : remoteRepositories) {
                repos.append(", ");

                if (repository != null) {
                    repos.append(repository.getId())

    map.put("foo", 1);
    assertFalse(map.remove("foo", 2));
    assertFalse(map.remove("bar", 1));
    assertEquals(Integer.valueOf(1), map.get("foo"));
    assertTrue(map.remove("foo", 1));
    assertTrue(map.isEmpty());
  }

  public void testReplace() {
    TestMap map = new TestMap();
    map.put("foo", 1);
    assertEquals(Integer.valueOf(1), map.replace("foo", 2));
    assertThat(map.replace("bar", 3)).isNull();

    // -------------------------------------------------------------------------------------------
    public MetadataTreeNode getClasspathAsTree() throws MetadataResolutionException {
        if (classpath == null || classpath.isEmpty()) {
            return null;
        }

        MetadataTreeNode tree = null;
        MetadataTreeNode parent = null;

        for (ArtifactMetadata md : classpath) {

        return getGroupId()
                + ':'
                + getArtifactId()
                + ':'
                + getExtension()
                + ':'
                + c
                + (c.isEmpty() ? "" : ":")
                + getVersionConstraint();
    }