if v := strings.ToLower(os.Getenv("TERM")); v == "" || v == "dumb" {
		return nil
	}
	// test if we can use term.ReadLine
	// that assumes operation in the raw mode.
	oldState, err := term.MakeRaw(0)
	if err != nil {
		return nil
	}
	term.Restore(0, oldState)

	rw := struct {
		io.Reader
		io.Writer
	}{os.Stdin, os.Stderr}
	return &readlineUI{term: term.NewTerminal(rw, "")}
}

    private static final Object MISSING = new Object();
    private final ConcurrentMap<String, Object> loadedClasses = new MapMaker().weakValues().makeMap();
    private final ConcurrentMap<String, Object> resources = new MapMaker().makeMap();
    private final ClassLoader parent;

    static {
        try {
            ClassLoader.registerAsParallelCapable();
        } catch (NoSuchMethodError ignore) {

    private final Map<String, Map<ComponentArtifactIdentifier, ResolvableArtifact>> cachePerRepo = new MapMaker().makeMap();
    private final Map<String, Map<ComponentArtifactIdentifier, ResolvableArtifact>> cachePerRepoWithVerification = new MapMaker().makeMap();

    /**
     * For a remote repository, the only thing required is a resolved artifact cache.

import (
	"fmt"
	"go/constant"
	"go/token"
	"math"
	"slices"
)

func Example_complexNumbers() {
	// Create the complex number 2.3 + 5i.
	ar := constant.MakeFloat64(2.3)
	ai := constant.MakeImag(constant.MakeInt64(5))
	a := constant.BinaryOp(ar, token.ADD, ai)

	// Compute (2.3 + 5i) * 11.
	b := constant.MakeUint64(11)
	c := constant.BinaryOp(a, token.MUL, b)

	// Convert c into a complex128.

func printnl()

//go:noescape
func useT40(*T40)

type T40 struct {
	m map[int]int
}

func newT40() *T40 {
	ret := T40{}
	ret.m = make(map[int]int, 42) // ERROR "live at call to makemap: &ret$"
	return &ret
}

func bad40() {
	t := newT40() // ERROR "stack object ret T40$" "stack object .autotmp_[0-9]+ runtime.hmap$"
	printnl()     // ERROR "live at call to printnl: ret$"
	useT40(t)
}

 *
 * <p>Usage example:
 *
 * <pre>{@code
 * ConcurrentMap<Request, Stopwatch> timers = new MapMaker()
 *     .concurrencyLevel(4)
 *     .weakKeys()
 *     .makeMap();
 * }</pre>
 *
 * <p>These features are all optional; {@code new MapMaker().makeMap()} returns a valid concurrent
 * map that behaves similarly to a {@link ConcurrentHashMap}.
 *

    // GWT technically only supports concurrencyLevel == 1, but we silently
    // ignore other positive values.
    return this;
  }

  public <K, V> ConcurrentMap<K, V> makeMap() {
    return new ConcurrentHashMap<K, V>(initialCapacity);
  }

 *
 * <p>Usage example:
 *
 * <pre>{@code
 * ConcurrentMap<Request, Stopwatch> timers = new MapMaker()
 *     .concurrencyLevel(4)
 *     .weakKeys()
 *     .makeMap();
 * }</pre>
 *
 * <p>These features are all optional; {@code new MapMaker().makeMap()} returns a valid concurrent
 * map that behaves similarly to a {@link ConcurrentHashMap}.
 *

	c.first = pd.link
	unlock(&c.lock)
	return pd
}

// makeArg converts pd to an interface{}.
// makeArg does not do any allocation. Normally, such
// a conversion requires an allocation because pointers to
// types which embed runtime/internal/sys.NotInHeap (which pollDesc is)
// must be stored in interfaces indirectly. See issue 42076.
func (pd *pollDesc) makeArg() (i any) {
	x := (*eface)(unsafe.Pointer(&i))
	x._type = pdType

}

func TestIssue55030(t *testing.T) {
	// makeSig makes the signature func(typ...)
	makeSig := func(typ Type) {
		par := NewVar(nopos, nil, "", typ)
		params := NewTuple(par)
		NewSignatureType(nil, nil, nil, params, nil, true)
	}

	// makeSig must not panic for the following (example) types:
	// []int
	makeSig(NewSlice(Typ[Int]))

	// string
	makeSig(Typ[String])

	// P where P's core type is string