SettableFuture<String> f = SettableFuture.create();
    MockCallback callback = new MockCallback("foo");
    addCallback(f, callback, directExecutor());
    f.set("foo");
  }

  public void testExecutorSuccess() {
    CountingSameThreadExecutor ex = new CountingSameThreadExecutor();
    SettableFuture<String> f = SettableFuture.create();
    MockCallback callback = new MockCallback("foo");

## Crea un Pull Request { #create-a-pull-request }

Puedes [contribuir](contributing.md){.internal-link target=_blank} al código fuente con Pull Requests, por ejemplo:

* Para corregir un error tipográfico que encontraste en la documentación.

package zip_test

import (
	"archive/zip"
	"bytes"
	"compress/flate"
	"fmt"
	"io"
	"log"
	"os"
)

func ExampleWriter() {
	// Create a buffer to write our archive to.
	buf := new(bytes.Buffer)

	// Create a new zip archive.
	w := zip.NewWriter(buf)

	// Add some files to the archive.
	var files = []struct {
		Name, Body string
	}{

      implements TestListGenerator<Entry<String, Integer>> {
    @Override
    public List<Entry<String, Integer>> create(Object... elements) {
      return (List<Entry<String, Integer>>) super.create(elements);
    }
  }

  public static Test suite() {
    TestSuite suite = new TestSuite();

    suite.addTest(transformSuite());
    suite.addTest(filterSuite());

{* ../../docs_src/dependencies/tutorial011_an_py39.py hl[9] *}

In this case, **FastAPI** won't ever touch or care about `__init__`, we will use it directly in our code.

## Create an instance { #create-an-instance }

We could create an instance of this class with:

{* ../../docs_src/dependencies/tutorial011_an_py39.py hl[18] *}

        // Arrange
        stubAcquireReturnsSelf();
        List<FileEntry[]> pages = List.of(new FileEntry[][] { new FileEntry[] {} });

        // Create iterator where open() returns null by giving null initial
        TestIterator it = TestIterator.create(tree, parent, "*", null, 0, null, pages);

        // Assert
        assertFalse(it.hasNext(), "No next when opened with null initial");

err != nil { return err } s.initBlock = bytes.Clone(b[marshaledSize:]) return nil } // NewShake128 creates a new SHAKE128 XOF. func NewShake128() *SHAKE { return &SHAKE{d: Digest{rate: rateK256, outputLen: 32, dsbyte: dsbyteShake}} } // NewShake256 creates a new SHAKE256 XOF. func NewShake256() *SHAKE { return &SHAKE{d: Digest{rate: rateK512, outputLen: 64, dsbyte: dsbyteShake}} } // NewCShake128 creates a new cSHAKE128 XOF. // // N is used to define functions based on cSHAKE, it can be empty when plain...

	}

	if err := DB.Exec("CREATE EXTENSION IF NOT EXISTS pgcrypto;").Error; err != nil {
		t.Errorf("Failed to create extension pgcrypto, got error %v", err)
	}

	DB.Migrator().DropTable(&Yasuo{})

	if err := DB.AutoMigrate(&Yasuo{}); err != nil {
		t.Fatalf("Failed to migrate for uuid default value, got error: %v", err)
	}

	yasuo := Yasuo{Name: "jinzhu"}
	if err := DB.Create(&yasuo).Error; err != nil {

  public Test testsForEmptyList() {
    return ListTestSuiteBuilder.using(
            new TestStringListGenerator() {
              @Override
              public List<String> create(String[] elements) {
                return emptyList();
              }
            })
        .named("emptyList")
        .withFeatures(CollectionFeature.SERIALIZABLE, CollectionSize.ZERO)

  public Test testsForEmptyList() {
    return ListTestSuiteBuilder.using(
            new TestStringListGenerator() {
              @Override
              public List<String> create(String[] elements) {
                return emptyList();
              }
            })
        .named("emptyList")
        .withFeatures(CollectionFeature.SERIALIZABLE, CollectionSize.ZERO)