* writeObject} methods.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible(emulated = true)
@ElementTypesAreNonnullByDefault
abstract class AbstractMapBasedMultiset<E extends @Nullable Object> extends AbstractMultiset<E>
    implements Serializable {

  transient ObjectCountHashMap<E> backingMap;
  transient long size;

  AbstractMapBasedMultiset(int distinctElements) {

                final Object attributesObj = attributesField.get(tokenizer);
                attributesField.set(this, attributesObj);

                final Field attributeImplsField = getAccessibleField(AttributeSource.class, "attributeImpls");
                final Object attributeImplsObj = attributeImplsField.get(tokenizer);

 * under the License.
 */
package org.apache.maven.plugin;

/**
 * Base exception.
 *
 */
public abstract class AbstractMojoExecutionException extends Exception {
    protected Object source;

    protected String longMessage;

    public AbstractMojoExecutionException(String message) {
        super(message);
    }

    public AbstractMojoExecutionException(String message, Throwable cause) {

        "components": {
            "schemas": {
                "ValidationError": {
                    "title": "ValidationError",
                    "required": ["loc", "msg", "type"],
                    "type": "object",
                    "properties": {
                        "loc": {
                            "title": "Location",
                            "type": "array",
                            "items": {

        "components": {
            "schemas": {
                "ValidationError": {
                    "title": "ValidationError",
                    "required": ["loc", "msg", "type"],
                    "type": "object",
                    "properties": {
                        "loc": {
                            "title": "Location",
                            "type": "array",
                            "items": {

```Python hl_lines="2  14"
{!../../docs_src/custom_response/tutorial007.py!}
```

#### Using `StreamingResponse` with file-like objects

If you have a file-like object (e.g. the object returned by `open()`), you can create a generator function to iterate over that file-like object.

That way, you don't have to read it all first in memory, and you can pass that generator function to the `StreamingResponse`, and return it.

    private final Entry<K, V> delegate;
    private final Object mutex;

    TestEntry(Entry<K, V> delegate, Object mutex) {
      this.delegate = delegate;
      this.mutex = mutex;
    }

    @Override
    protected Entry<K, V> delegate() {
      return delegate;
    }

    @Override
    public boolean equals(@Nullable Object object) {
      assertTrue(Thread.holdsLock(mutex));

  @SuppressWarnings("SelfEquals")
  public void testEquals_self() {
    assertTrue("An Object should be equal to itself.", collection.equals(collection));
  }

  public void testEquals_null() {
    // noinspection ObjectEqualsNull
    assertFalse("An object should not be equal to null.", collection.equals(null));
  }

  public void testEquals_notACollection() {

    @Subscribe
    public void handle(@Nullable Object unused) {}

    Subscriber toSubscriber() throws Exception {
      return Subscriber.create(eventBus, this, subscriberMethod());
    }

    SubscriberExceptionContext toContext() {
      return new SubscriberExceptionContext(eventBus, new Object(), this, subscriberMethod());
    }

    private static Method subscriberMethod() {

                "Body_create_upload_files_uploadfiles__post": {
                    "title": "Body_create_upload_files_uploadfiles__post",
                    "required": ["files"],
                    "type": "object",
                    "properties": {
                        "files": {
                            "title": "Files",
                            "type": "array",