private final Map<String, PDFParserConfig> pdfParserConfigMap = new ConcurrentHashMap<>();

    /**
     * Creates a new TikaExtractor instance.
     */
    public TikaExtractor() {
        super();
    }

    /**
     * Initializes this component.
     */
    @PostConstruct
    public void init() {

///

### Paso 2: crea una "instance" de `FastAPI`

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

Aquí la variable `app` será una "instance" de la clase `FastAPI`.

Este será el punto principal de interacción para crear toda tu API.

### Paso 3: crea una *path operation*

#### Path

    assertThrows(IndexOutOfBoundsException.class, () -> iia3.subArray(1, 4));
  }

  /*
   * Whenever an implementation uses `instanceof` on a parameter instance, the test has to know that
   * (so much for "black box") and try instances that both do and don't pass the check. The "don't"
   * half of that is more awkward to arrange...
   */
  private static <T> Iterable<T> iterable(Collection<T> collection) {

import java.util.Set;
import java.util.concurrent.TimeUnit;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * Helper class for creating {@link CacheBuilder} instances with all combinations of several sets of
 * parameters.
 *
 * @author mike nonemacher
 */
@NullUnmarked
class CacheBuilderFactory {

        // Salt should be different for each instance
        SecureCredentialStorage storage2 = new SecureCredentialStorage(masterPassword.clone());
        try {
            byte[] salt2 = storage2.getSalt();
            assertFalse(Arrays.equals(salt, salt2), "Different instances should have different salts");
        } finally {
            storage2.close();
        }
    }

Lorsque vous importez `Query`, `Path` et d'autres de `fastapi`, ce sont en fait des fonctions.

Ces dernières, lorsqu'elles sont appelées, renvoient des instances de classes du même nom.

Ainsi, vous importez `Query`, qui est une fonction. Et lorsque vous l'appelez, elle renvoie une instance d'une classe également nommée `Query`.

  }

  /**
   * Returns a new {@link ByteArrayDataInput} instance to read from the {@code bytes} array from the
   * beginning.
   */
  @J2ktIncompatible
  public static ByteArrayDataInput newDataInput(byte[] bytes) {
    return newDataInput(new ByteArrayInputStream(bytes));
  }

  /**
   * Returns a new {@link ByteArrayDataInput} instance to read from the {@code bytes} array,
   * starting at the given position.

    return withParameters(attribute, ImmutableSet.of(value));
  }

  /**
   * Returns a new instance with the same type and subtype as this instance, with the {@code
   * charset} parameter set to the {@link Charset#name name} of the given charset. Only one {@code
   * charset} parameter will be present on the new instance regardless of the number set on this
   * one.
   *

    //                                                                           =========
    private static final SearchLogDbm _instance = new SearchLogDbm();

    private SearchLogDbm() {
    }

    public static SearchLogDbm getInstance() {
        return _instance;
    }

    // ===================================================================================

    // Use reflection to reset the singleton instance between tests
    @BeforeEach
    @AfterEach
    void resetSingleton() {
        try {
            Field instance = SingletonContext.class.getDeclaredField("INSTANCE");
            instance.setAccessible(true);
            instance.set(null, null);
        } catch (NoSuchFieldException | IllegalAccessException e) {