}
	// Same as singleJoiningSlash, but uses EscapedPath to determine
	// whether a slash should be added
	apath := a.EscapedPath()
	bpath := b.EscapedPath()

	aslash := strings.HasSuffix(apath, "/")
	bslash := strings.HasPrefix(bpath, "/")

	switch {
	case aslash && bslash:
		return a.Path + b.Path[1:], apath + bpath[1:]
	case !aslash && !bslash:
		return a.Path + "/" + b.Path, apath + "/" + bpath
	}

// See-also: https://github.com/golang/go/issues/44290
func singleJoiningSlash(a, b string) string {
	aslash := strings.HasSuffix(a, "/")
	bslash := strings.HasPrefix(b, "/")
	switch {
	case aslash && bslash:
		return a + b[1:]
	case !aslash && !bslash:
		return a + "/" + b
	}
	return a + b
}

func (h *UpgradeAwareHandler) DialForUpgrade(req *http.Request) (net.Conn, error) {

	// work.
	var period int
	// slash+1: if there's no slash, the value is -1 and start is 0; otherwise
	// start is the byte after the slash.
	for start := slash + 1; start < len(arg); start = period + 1 {
		period = strings.Index(arg[start:], ".")
		symbol := ""
		if period < 0 {
			period = len(arg)
		} else {
			period += start
			symbol = arg[period+1:]
		}

	// ReportNotFound will return errFileNotFound if all disks reports the BaseDir cannot be found.
	ReportNotFound bool

	// FilterPrefix will only return results with given prefix within folder.
	// Should never contain a slash.
	FilterPrefix string

	// ForwardTo will forward to the given object path.
	ForwardTo string

	// Limit the number of returned objects if > 0.
	Limit int

	// DiskID contains the disk ID of the disk.

	return filepathlite.Localize(path)
}

// ToSlash returns the result of replacing each separator character
// in path with a slash ('/') character. Multiple separators are
// replaced by multiple slashes.
func ToSlash(path string) string {
	return filepathlite.ToSlash(path)
}

// FromSlash returns the result of replacing each slash ('/') character
// in path with a separator character. Multiple slashes are replaced

        unqualified.asClass() == TestPlugin1

        def qualified = pluginRegistry.lookup(DefaultPluginId.of("org.gradle.somePlugin"))
        qualified.pluginId == DefaultPluginId.of("org.gradle.somePlugin")
        unqualified.displayName.displayName == "plugin 'org.gradle.somePlugin'"
        qualified.asClass() == TestPlugin1
    }

	// “A pathname that contains at least one non- <slash> character and that ends
	// with one or more trailing <slash> characters shall not be resolved
	// successfully unless the last pathname component before the trailing <slash>
	// characters names an existing directory [...].”
	//
	// Since Walk does not traverse symlinks itself, its behavior should depend on
	// whether the path passed to Walk ends in a slash: if it does not end in a slash,

        }
    }

    @Override
    public <P extends Plugin> P addImperativePlugin(PluginImplementation<P> plugin) {
        doApply(plugin);
        Class<? extends P> pluginClass = plugin.asClass();
        return pluginClass.cast(instances.get(pluginClass));
    }

    @Override
    public <P extends Plugin> P addImperativePlugin(Class<P> type) {
        return addImperativePlugin(pluginRegistry.inspect(type));

    List<String> b = asList("c", "d");
    ImmutableSortedMultiset<String> multiset =
        ImmutableSortedMultiset.<String>naturalOrder().addAll(a).addAll(b).build();
    assertEquals(HashMultiset.create(asList("a", "b", "c", "d")), multiset);
  }

  public void testBuilderAddAllMultiset() {
    Multiset<String> a = HashMultiset.create(asList("a", "b", "b"));

// many patterns. The patterns are interpreted relative to the package directory
// containing the source file. The path separator is a forward slash, even on
// Windows systems. Patterns may not contain ‘.’ or ‘..’ or empty path elements,
// nor may they begin or end with a slash. To match everything in the current
// directory, use ‘*’ instead of ‘.’. To allow for naming files with spaces in