"equiv":    "\u2261",
	"le":       "\u2264",
	"ge":       "\u2265",
	"sub":      "\u2282",
	"sup":      "\u2283",
	"nsub":     "\u2284",
	"sube":     "\u2286",
	"supe":     "\u2287",
	"oplus":    "\u2295",
	"otimes":   "\u2297",
	"perp":     "\u22A5",
	"sdot":     "\u22C5",
	"lceil":    "\u2308",
	"rceil":    "\u2309",
	"lfloor":   "\u230A",
	"rfloor":   "\u230B",
	"lang":     "\u2329",

	{`a(b|c)d`, `cat{lit{a}cap{cc{0x62-0x63}}lit{d}}`},

	// Test flattening.
	{`(?:a)`, `lit{a}`},
	{`(?:ab)(?:cd)`, `str{abcd}`},
	{`(?:a+b+)(?:c+d+)`, `cat{plus{lit{a}}plus{lit{b}}plus{lit{c}}plus{lit{d}}}`},
	{`(?:a+|b+)|(?:c+|d+)`, `alt{plus{lit{a}}plus{lit{b}}plus{lit{c}}plus{lit{d}}}`},
	{`(?:a|b)|(?:c|d)`, `cc{0x61-0x64}`},
	{`a|.`, `dot{}`},
	{`.|a`, `dot{}`},

// It is controlled by "k8s:prerelease-lifecycle-gen:deprecated" tags in types.go or  "k8s:prerelease-lifecycle-gen:introduced" plus three minor.
func (in *ControllerRevision) APILifecycleDeprecated() (major, minor int) {
	return 1, 8
}

// It is controlled by "k8s:prerelease-lifecycle-gen:deprecated" tags in types.go or  "k8s:prerelease-lifecycle-gen:introduced" plus three minor.
func (in *MutatingWebhookConfiguration) APILifecycleDeprecated() (major, minor int) {
	return 1, 16
}

// It is controlled by "k8s:prerelease-lifecycle-gen:deprecated" tags in types.go or  "k8s:prerelease-lifecycle-gen:introduced" plus three minor.
func (in *ControllerRevision) APILifecycleDeprecated() (major, minor int) {
	return 1, 9
}

        flatten(s1) == [dir1.path, "1:dir2/dir3", "1:dir5/and/more"]

        def s2 = s1.plus(dir1dir2dir4)
        flatten(s2) == [dir1.path, "1:dir2", "2:dir3", "2:dir4", "1:dir5/and/more"]

        def s3 = s2.plus(dir6)
        flatten(s3) == [parent.path, "1:dir1", "2:dir2", "3:dir3", "3:dir4", "2:dir5/and/more", "1:dir6"]

        def s4 = s3.plus(dir1dir2)
        flatten(s4) == [parent.path, "1:dir1", "2:dir2", "2:dir5/and/more", "1:dir6"]

// It is controlled by "k8s:prerelease-lifecycle-gen:deprecated" tags in types.go or  "k8s:prerelease-lifecycle-gen:introduced" plus three minor.
func (in *CSIDriver) APILifecycleDeprecated() (major, minor int) {
	return 1, 19
}

// It is controlled by "k8s:prerelease-lifecycle-gen:deprecated" tags in types.go or  "k8s:prerelease-lifecycle-gen:introduced" plus three minor.
func (in *ClusterRole) APILifecycleDeprecated() (major, minor int) {
	return 1, 17
}

// It is controlled by "k8s:prerelease-lifecycle-gen:deprecated" tags in types.go or  "k8s:prerelease-lifecycle-gen:introduced" plus three minor.
func (in *DaemonSet) APILifecycleDeprecated() (major, minor int) {
	return 1, 8
}

            }

            return plus(this, action);
        }

        @Override
        ImmutableActionSet<T> addAll(SetWithFewActions<T> source) {
            return plus(this, source);
        }

        @Override
        ImmutableActionSet<T> addAll(SetWithManyActions<T> source) {
            return plus(this, source);
        }

        @Override