You might notice that to create an instance of a Python class, you use that same syntax.

For example:

```Python
class Cat:
    def __init__(self, name: str):
        self.name = name


fluffy = Cat(name="Mr Fluffy")
```

In this case, `fluffy` is an instance of the class `Cat`.

And to create `fluffy`, you are "calling" `Cat`.

So, a Python class is also a **callable**.

import jakarta.annotation.Resource;

/**
 * @author shinsuke
 * @author Keiichi Watanabe
 */
public class AdminFileauthAction extends FessAdminAction {

    public static final String ROLE = "admin-fileauth";

    private static final Logger logger = LogManager.getLogger(AdminFileauthAction.class);

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

/**
 * @author shinsuke
 * @author Shunji Makino
 * @author Keiichi Watanabe
 */
public class AdminReqheaderAction extends FessAdminAction {

    public static final String ROLE = "admin-reqheader";

    private static final Logger logger = LogManager.getLogger(AdminReqheaderAction.class);

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

   * ImmutableList<NewType> result =
   *     (ImmutableList) stream.filter(NewType.class::isInstance).collect(toImmutableList());}
   * </pre>
   */
  @GwtIncompatible // Class.isInstance
  public final <T> FluentIterable<T> filter(Class<T> type) {
    return from(Iterables.filter(getDelegate(), type));
  }

  /**

   * {@link Predicate#apply}. Do not provide a predicate such as {@code
   * Predicates.instanceOf(ArrayList.class)}, which is inconsistent with equals. (See {@link
   * Iterables#filter(Iterable, Class)} for related functionality.)
   *
   * @since 14.0
   */
  public static <E extends @Nullable Object> Multiset<E> filter(

   * {@link Predicate#apply}. Do not provide a predicate such as {@code
   * Predicates.instanceOf(ArrayList.class)}, which is inconsistent with equals. (See {@link
   * Iterables#filter(Iterable, Class)} for related functionality.)
   *
   * @since 14.0
   */
  public static <E extends @Nullable Object> Multiset<E> filter(

## Custom response class

You can create your own custom response class, inheriting from `Response` and using it.

For example, let's say that you want to use <a href="https://github.com/ijl/orjson" class="external-link" target="_blank">`orjson`</a>, but with some custom settings not used in the included `ORJSONResponse` class.

import jakarta.annotation.Resource;

/**
 * @author shinsuke
 * @author Keiichi Watanabe
 */
public class AdminSchedulerAction extends FessAdminAction {

    public static final String ROLE = "admin-scheduler";

    private static final Logger logger = LogManager.getLogger(AdminSchedulerAction.class);

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

     * @param className
     *            クラスのバイナリ名。{@literal null}や空文字列であってはいけません
     * @return 結果の<code>Class</code>オブジェクト
     * @throws ClassNotFoundRuntimeException
     *             クラスが見つからなかった場合
     * @see java.lang.ClassLoader#loadClass(String)
     */
    public static Class<?> loadClass(final ClassLoader loader, final String className) {
        assertArgumentNotNull("loader", loader);

bound existingClaim: "" ## minio data Persistent Volume Storage Class ## If defined, storageClassName: <storageClass> ## If set to "-", storageClassName: "", which disables dynamic provisioning ## If undefined (the default) or set to null, no storageClassName spec is ## set, choosing the default provisioner. (gp2 on AWS, standard on ## GKE, AWS & OpenStack) ## ## Storage class of PV to bind. By default it looks for standard storage class. ## If the PV uses a different storage class, specify that here....