{* ../../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

We could create an instance of this class with:

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

    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/files/": {
                "post": {
                    "summary": "Create File",
                    "operationId": "create_file_files__post",
                    "requestBody": {
                        "content": {
                            "multipart/form-data": {

	user := *GetUser("update-many2many", Config{})

	if err := DB.Create(&user).Error; err != nil {
		t.Fatalf("errors happened when create: %v", err)
	}

	user.Languages = []Language{{Code: "zh-CN", Name: "Chinese"}, {Code: "en", Name: "English"}}
	for _, lang := range user.Languages {
		DB.Create(&lang)
	}
	user.Friends = []*User{{Name: "friend-1"}, {Name: "friend-2"}}

 *
 * <ol>
 *   <li>First, if only one {@code Foo} is null, that null value is treated as <i>greater</i>
 *   <li>Next, non-null {@code Foo} values are passed to {@code getBarFunction} (we will be
 *       comparing {@code Bar} values from now on)
 *   <li>Next, if only one {@code Bar} is null, that null value is treated as <i>lesser</i>
 *   <li>Finally, natural ordering is used (i.e. the result of {@code Bar.compareTo(Bar)} is

 */

package gradlebuild.testcleanup.extension

import org.gradle.api.provider.Property


/**
 *  An extension for project build script to configure whether the leftover files should be treated:
 *  report only, or a failure.
 */
interface TestFileCleanUpExtension {
    val reportOnly: Property<Boolean>

   */
  // Use (first, rest) so that `of(someLongArray)` won't compile (they should use copyOf), which is
  // okay since we have to copy the just-created array anyway.
  public static ImmutableLongArray of(long first, long... rest) {
    checkArgument(
        rest.length <= Integer.MAX_VALUE - 1, "the total number of elements must fit in an int");

   */
  // Use (first, rest) so that `of(someIntArray)` won't compile (they should use copyOf), which is
  // okay since we have to copy the just-created array anyway.
  public static ImmutableIntArray of(int first, int... rest) {
    checkArgument(
        rest.length <= Integer.MAX_VALUE - 1, "the total number of elements must fit in an int");

    assertThrows(IOException.class, () -> reader.ready());

    assertThrows(IOException.class, () -> reader.mark(10));

    assertThrows(IOException.class, () -> reader.reset());
  }

  /**
   * Creates a CharSequenceReader wrapping the given CharSequence and tests that the reader produces
   * the same sequence when read using each type of read method it provides.
   */

/**
 * Test cases for the default {@code ModelResolver} implementation.
 *
 * @since 3.5.0
 */
final class DefaultModelResolverTest extends AbstractRepositoryTestCase {

    /**
     * Creates a new {@code DefaultModelResolverTest} instance.
     */
    public DefaultModelResolverTest() {
        super();
    }

    @Test

///

### Step 2: create a `FastAPI` "instance"

{* ../../docs_src/first_steps/tutorial001.py hl[3] *}

Here the `app` variable will be an "instance" of the class `FastAPI`.

This will be the main point of interaction to create all your API.

### Step 3: create a *path operation*

#### Path