private String join(String message1, String message2) {
        String message = "";

        if (message1 != null && !message1.isEmpty()) {
            message = message1.trim();
        }

        if (message2 != null && !message2.isEmpty()) {
            if (message != null && !message.isEmpty()) {
                if (message.endsWith(".") || message.endsWith("!") || message.endsWith(":")) {
                    message += " ";

  }

  /**
   * Returns an immutable range set containing the specified single range. If {@link Range#isEmpty()
   * range.isEmpty()}, this is equivalent to {@link ImmutableRangeSet#of()}.
   */
  public static <C extends Comparable> ImmutableRangeSet<C> of(Range<C> range) {
    checkNotNull(range);
    if (range.isEmpty()) {
      return of();
    } else if (range.equals(Range.all())) {
      return all();
    } else {

        LinkedList<ScopeState> stack = values.get();
        if (stack == null || stack.isEmpty()) {
            throw new IllegalStateException();
        }
        return stack.getFirst();
    }

    public void exit() throws MojoExecutionException {
        final LinkedList<ScopeState> stack = values.get();
        if (stack == null || stack.isEmpty()) {
            throw new IllegalStateException();
        }

            this.implementationModulepath = implementationModulepath;
        }

        public boolean isEmpty() {
            return applicationClasspath.isEmpty() && applicationModulepath.isEmpty() &&
                implementationClasspath.isEmpty() && implementationModulepath.isEmpty();
        }
    }

    /**

        // is not a bug but a performance optimization.
        if (capabilities.isEmpty() && (component.hasMoreThanOneSelectedNodeUsingVariantAwareResolution() || capabilitiesConflictHandler.hasSeenCapability(component.getImplicitCapability()))) {
            action.execute(component.getImplicitCapability());
        } else {
            // The isEmpty check is not required, might look innocent, but Guava's performance bad for an empty immutable list

    }

    public Conflict popConflict() {
        assert !conflicts.isEmpty();
        Conflict conflict = conflicts.pop();
        for (K participant : conflict.participants) {
            conflictsByParticipant.remove(participant);
        }
        return conflict;
    }

    public boolean isEmpty() {
        return conflicts.isEmpty();
    }

    boolean hasMatchingConflict(Predicate<T> predicate) {

                }
            }
            if (targetNodes.isEmpty()) {
                // There is a chance we could not attach target configurations previously
                List<EdgeState> unattachedDependencies = targetComponent.getModule().getUnattachedDependencies();
                if (!unattachedDependencies.isEmpty()) {
                    for (EdgeState otherEdge : unattachedDependencies) {

        @Override
        public void call(SourceUnit source) {
            if (!source.getAST().getMethods().isEmpty()) {
                hasMethods = true;
            }
            emptyScript = isEmpty(source);
        }

        private boolean isEmpty(SourceUnit source) {
            List<Statement> statements = source.getAST().getStatementBlock().getStatements();

        }
    }

    private static boolean isNotEmpty(TestFilterSpec filter) {
        return !filter.getIncludedTests().isEmpty()
            || !filter.getIncludedTestsCommandLine().isEmpty()
            || !filter.getExcludedTests().isEmpty();
    }

    private static class ClassMethodNameFilter implements PostDiscoveryFilter {
        private final TestSelectionMatcher matcher;

                    while (prefixStack.size() > depth) {
                        prefixStack.removeLast();
                    }
                    if (node.children.isEmpty()) {
                        String root;
                        if (prefixStack.isEmpty()) {
                            root = node.prefix;
                        } else {
                            StringBuilder builder = new StringBuilder();