///

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

    }
  }

  private enum LinkedListSupplier implements Supplier<List<?>> {
    INSTANCE;

    static <V extends @Nullable Object> Supplier<List<V>> instance() {
      // Each call generates a fresh LinkedList, which can serve as a List<V> for any V.
      @SuppressWarnings({"rawtypes", "unchecked"})
      Supplier<List<V>> result = (Supplier) INSTANCE;
      return result;
    }

    @Override

    }
  }

  private enum LinkedListSupplier implements Supplier<List<?>> {
    INSTANCE;

    static <V extends @Nullable Object> Supplier<List<V>> instance() {
      // Each call generates a fresh LinkedList, which can serve as a List<V> for any V.
      @SuppressWarnings({"rawtypes", "unchecked"})
      Supplier<List<V>> result = (Supplier) INSTANCE;
      return result;
    }

    @Override

        // Assert
        assertNotSame(original, copy, "clone should return a different instance");
        assertTrue(original.equals(copy), "Cloned instance should be equal by content");

        // Mutate original backing array; clone should remain based on previous snapshot
        data[0] = 99;

    /**
     * Map containing field names as keys and their corresponding configuration values as values.
     */
    private final Map<String, String> params;

    /**
     * Constructs a new FieldConfigs instance with the specified parameter map.
     *
     * @param params the map containing field names as keys and configuration values as values
     */
    public FieldConfigs(final Map<String, String> params) {

 * This class handles the setup and organization of query facets for the search interface,
 * including automatic generation of file type facets and custom query mappings.
 */
public class FacetQueryView {
    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(FacetQueryView.class);

    /** Title for this facet query view */
    protected String title;

    @Test
    @DisplayName("getHandle returns the exact handle instance")
    void getHandle_returnsHandle() throws Exception {
        // Arrange
        SmbPipeOutputStream out = newStream();

        // Act
        SmbPipeHandleImpl got = out.getHandle();

        // Assert
        assertSame(handle, got, "getHandle should expose the same instance passed to constructor");
    }

    @Test

* form (as in HTML form): formulario
* type checks: chequeo de tipos
* parse: parse
* parsing: parsing
* marshall: marshall
* library: paquete (do not translate to "biblioteca" or "librería")
* instance: instance (do not translate to "instancia")
* scratch the surface: tocar los conceptos básicos
* string: string
* bug: bug
* docs: documentación (do not translate to "documentos")

 * @since 2.0
 */
@GwtCompatible
@J2ktIncompatible
public final class EnumBiMap<K extends Enum<K>, V extends Enum<V>> extends AbstractBiMap<K, V> {
  /*
   * J2CL's EnumMap does not need the Class instance, so we can use Object.class instead. (Or we
   * could use null, but that messes with our nullness checking, including under J2KT. We could

        try {
            // Change default time zone temporarily
            TimeZone newTimeZone = TimeZone.getTimeZone("America/New_York");
            TimeZone.setDefault(newTimeZone);

            // Create new provider instance to pick up the new default
            FessUserTimeZoneProcessProvider newProvider = new FessUserTimeZoneProcessProvider();

            // Execute
            TimeZone result = newProvider.getRequestedTimeZone(requestManager);