}
        }
        assertTrue(value, !result.isEmpty() && result.get(0) > 0);
        return result;
    }

    private static boolean isNumberStartingWithZero(String number) {
        return number.length() > 1 && number.startsWith("0");
    }

    private static int findFirstNonVersionCharIndex(String s) {
        assertTrue(s, !s.isEmpty());

        for (int i = 0; i < s.length(); ++i) {

        values.add(0, new ScopeState());
    }

    protected ScopeState getScopeState() {
        if (values.isEmpty()) {
            throw new OutOfScopeException("Cannot access session scope outside of a scoping block");
        }
        return values.get(0);
    }

    public void exit() {
        if (values.isEmpty()) {
            throw new IllegalStateException();
        }
        values.remove(0);
    }

        // Do not share an ArtifactSet if the artifacts are modified by the dependency.
        if (!dependency.getDependencyMetadata().getArtifacts().isEmpty() ||
            !dependency.getAttributes().isEmpty() ||
            dependency.getExclusions().mayExcludeArtifacts()
        ) {
            int id = nextId++;

        ongoing.remove(new TransferResourceIdentifier(event.getResource()));
        put(event, ongoing.isEmpty());
    }

    @Override
    public void transferFailed(TransferEvent event) {
        ongoing.remove(new TransferResourceIdentifier(event.getResource()));
        put(event, ongoing.isEmpty());
    }

    private static class Exchange {
        private final TransferEvent event;

            boolean isBlankVersion = descriptor.getRequiredMavenVersion() == null
                    || descriptor.getRequiredMavenVersion().trim().isEmpty();

            if (isBlankVersion) {
                // only take value from underlying POM if plugin descriptor has no explicit Maven requirement

    public void close() {
        CompositeStoppable.stoppable(executor, cache).stop();
    }

    @Override
    public ClassPath transform(ClassPath classPath, StandardTransform transform) {
        if (classPath.isEmpty()) {
            return classPath;
        }
        return transformPipelineFor(transform).transform(classPath);

    }

    @FunctionalInterface
    private interface TransformPipeline {

                    Set<JavaAnnotation<JavaMethod>> nullableAnnotations = extractPossibleNullable(annotations);
                    if (!nullableAnnotations.isEmpty()) {

  }

  private static boolean isEmpty(Iterable<?> iterable) {
    return iterable instanceof Collection
        ? ((Collection<?>) iterable).isEmpty()
        : !iterable.iterator().hasNext();
  }

  public static void assertEmpty(Iterable<?> iterable) {
    if (!isEmpty(iterable)) {
      fail("Not true that " + iterable + " is empty");
    }
  }

    }

    @Override
    protected List<? extends DependencyMetadata> getAllDependencies() {
        List<? extends DependencyMetadata> superDependencies = super.getAllDependencies();
        if (syntheticDependencies.isEmpty()) {
            return superDependencies;
        }
        int expectedSize = superDependencies.size() + syntheticDependencies.size();

      public boolean contains(@CheckForNull Object element) {
        return multiset1.contains(element) || multiset2.contains(element);
      }

      @Override
      public boolean isEmpty() {
        return multiset1.isEmpty() && multiset2.isEmpty();
      }

      @Override
      public int count(@CheckForNull Object element) {
        return Math.max(multiset1.count(element), multiset2.count(element));
      }