return new NullRemovalListener<>();
  }

  /** Type-inferring factory method for creating a {@link QueuingRemovalListener}. */
  @GwtIncompatible // ConcurrentLinkedQueue
  static <K, V> QueuingRemovalListener<K, V> queuingRemovalListener() {
    return new QueuingRemovalListener<>();
  }

  /** Type-inferring factory method for creating a {@link CountingRemovalListener}. */
  static <K, V> CountingRemovalListener<K, V> countingRemovalListener() {

/**
 * A descriptor for a <i>discrete</i> {@code Comparable} domain such as all {@link Integer}
 * instances. A discrete domain is one that supports the three basic operations: {@link #next},
 * {@link #previous} and {@link #distance}, according to their specifications. The methods {@link
 * #minValue} and {@link #maxValue} should also be overridden for bounded types.
 *

 * <ul>
 *   <li>Access to the current {@link org.apache.maven.api.Project}</li>
 *   <li>Access to the {@link org.apache.maven.api.LocalRepository} and {@link org.apache.maven.api.RemoteRepository} configurations</li>
 *   <li>Access to Maven services through {@link org.apache.maven.api.Session#getService(Class)}</li>
 *   <li>Build configuration and settings</li>
 * </ul>
 *
 * <h3>Dependency management</h3>
 *

```

////

/// info

Để học nhiều hơn về <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic, tham khảo tài liệu của nó</a>.

///

**FastAPI** được dựa hoàn toàn trên Pydantic.

Bạn sẽ thấy nhiều ví dụ thực tế hơn trong [Hướng dẫn sử dụng](tutorial/index.md){.internal-link target=_blank}.

/// tip

<meta http-equiv="X-UA-Compatible" content="IE=edge">
<link href="${fe:url('/css/admin/bootstrap.min.css')}" rel="stylesheet" type="text/css" />
<link href="${fe:url('/css/admin/font-awesome.min.css')}" rel="stylesheet" type="text/css" />
<link href="${fe:url('/css/admin/adminlte.min.css')}" rel="stylesheet" type="text/css" />

.btn-outline-#{$color} {\n    @include button-outline-variant($value);\n  }\n}\n\n\n//\n// Link buttons\n//\n\n// Make a button look and behave like a link\n.btn-link {\n  font-weight: $font-weight-normal;\n  color: $link-color;\n  text-decoration: $link-decoration;\n\n  @include hover() {\n    color: $link-hover-color;\n    text-decoration: $link-hover-decoration;\n  }\n\n  &:focus,\n  &.focus {\n    text-decoration: $link-hover-decoration;\n  }\n\n  &:disabled,\n  &.disabled {\n    color: $btn-link-disabled-color;\n...

/**
 * Utility class for {@link Reader} operations.
 *
 * @author higa
 */
public abstract class ReaderUtil {

    /**
     * Do not instantiate.
     */
    protected ReaderUtil() {
    }

    /** Default buffer size */
    private static final int BUF_SIZE = 4096;

    /**
     * Creates a {@link Reader} to read from a file with the specified encoding.
     *

/** Static utility method for unchecked throwing of any {@link Throwable}. */
@GwtCompatible
final class SneakyThrows<T extends Throwable> {
  /**
   * Throws {@code t} as if it were an unchecked {@link Throwable}.
   *
   * <p>This method is useful primarily when we make a reflective call to a method with no {@code
   * throws} clause: Java forces us to handle an arbitrary {@link Throwable} from that method,

/** Static utility method for unchecked throwing of any {@link Throwable}. */
@GwtCompatible
final class SneakyThrows<T extends Throwable> {
  /**
   * Throws {@code t} as if it were an unchecked {@link Throwable}.
   *
   * <p>This method is useful primarily when we make a reflective call to a method with no {@code
   * throws} clause: Java forces us to handle an arbitrary {@link Throwable} from that method,

## Etiquetas de Documentación - OpenAPI

Para agregar etiquetas a tus *path operations*, y agruparlas en la interfaz de usuario de la documentación, lee la documentación para [Tutorial - Configuraciones de Path Operation - Etiquetas](../tutorial/path-operation-configuration.md#tags){.internal-link target=_blank}.

## Resumen y Descripción de Documentación - OpenAPI