*     <li>{@link #locking()} would create a lazy wrapper which performs locking when calling the supplier: the supplier will only be called once. Reading is done without locking once initialized.</li>
 * </ul>
 *
 * @param <T> the type of the lazy value
 */
public interface Lazy<T> extends Supplier<T> {
    /**
     * Executes an operation on the lazily computed value
     *

	".pdf":  "application/pdf",
	".png":  "image/png",
	".svg":  "image/svg+xml",
	".wasm": "application/wasm",
	".webp": "image/webp",
	".xml":  "text/xml; charset=utf-8",
}

var once sync.Once // guards initMime

var testInitMime, osInitMime func()

func initMime() {
	if fn := testInitMime; fn != nil {
		fn()
	} else {
		setMimeTypes(builtinTypesLower, builtinTypesLower)
		osInitMime()
	}

	configurationName string

	initObjectSelector sync.Once
	objectSelector     labels.Selector
	objectSelectorErr  error

	initNamespaceSelector sync.Once
	namespaceSelector     labels.Selector
	namespaceSelectorErr  error

	initClient sync.Once
	client     *rest.RESTClient
	clientErr  error

	compileMatcher  sync.Once
	compiledMatcher matchconditions.Matcher
}

package once

import (
	"context"
	"sync"
	"sync/atomic"
)

// Inspired from Golang sync.Once but it is only marked
// initialized when the provided function returns nil.

// Init represents the structure.
type Init struct {
	done uint32
	m    sync.Mutex
}

// Do is similar to sync.Once.Do - makes one successful

	"go.uber.org/atomic"
)

// SetForTest sets a variable for the duration of a test, then resets it once the test is complete.
func SetForTest[T any](t Failer, vv *T, v T) {
	old := *vv
	*vv = v
	t.Cleanup(func() {
		*vv = old
	})
}

// SetEnvForTest sets an environment variable for the duration of a test, then resets it once the test is complete.
func SetEnvForTest(t Failer, k, v string) {
	old, oldset := os.LookupEnv(k)

	epIpAddressRemote = "192.168.2.3"
	epPaAddress       = "10.0.0.3"
	protocol          = 6
	internalPort      = 80
	externalPort      = 32440
)

func TestGetNetworkByName(t *testing.T) {
	// TODO: remove skip once the test has been fixed.
	t.Skip("Skipping failing test on Windows.")
	hns := hns{hcn: newHcnImpl()}
	Network := mustTestNetwork(t)

	network, err := hns.getNetworkByName(Network.Name)
	if err != nil {
		t.Error(err)

/**
 * The possible strategies for displaying a welcome message on the command line.
 *
 * @since 7.5
 */
@Incubating
public enum WelcomeMessageDisplayMode {
    ONCE, // the default, show the welcome message once per Gradle version
    NEVER // suppress the welcome message

	// The call below must evaluate selectA() to determine the receiver to
	// use. This should happen exactly once per iteration. Assert that is
	// the case to ensure the IR manipulation does not result in over- or
	// under-evaluation.
	selectI := 0
	selectA := func(gotI int) Adder {
		if gotI != selectI {
			panic(fmt.Sprintf("selectA not called once per iteration; got i %d want %d", gotI, selectI))
		}
		selectI++

		if gotI%10 == 0 {

### Build session state

A "build session" represents a single invocation of Gradle, for example when you run `gradlew build`.
A session runs the build one or more times.
For example, when continuous build is enabled, the session may run the build many times, but when it is disabled, the session will run the build once only.

import java.util.concurrent.TimeUnit
import java.util.concurrent.atomic.AtomicInteger
import java.util.function.Supplier

class LazyTest extends Specification {

    def "#factoryName supplier code is executed once with use"() {
        def supplier = Mock(Supplier)

        when:
        def lazy = factory(supplier)

        then:
        0 * supplier._

        when:
        lazy.use {