So, it involves I/O (input/output), that requires "waiting" for things to be written to disk.

But `open()` doesn't use `async` and `await`.

So, we declare the event handler function with standard `def` instead of `async def`.

///

### `startup` and `shutdown` together

   * Long.bitCount(Long.MIN_VALUE) == 1}, but {@link Long#MIN_VALUE} is not a power of two.
   */
  // Whenever both tests are cheap and functional, it's faster to use &, | instead of &&, ||
  @SuppressWarnings("ShortCircuitBoolean")
  public static boolean isPowerOfTwo(long x) {
    return x > 0 & (x & (x - 1)) == 0;
  }

  /**

 * 'rootObject.getChild().getName()' for non-boolean properties, and
 * 'rootObject.getChild().isName()' for boolean properties.
 *
 * @deprecated use {@link org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public class ObjectBasedValueSource extends AbstractValueSource {

    private final Object root;

    /**

import org.codehaus.plexus.interpolation.ValueSource;

/**
 * StringVisitorModelInterpolator
 *
 * @since 3.6.2
 * @deprecated use {@link org.apache.maven.api.services.ModelBuilder} instead
 */
@Named
@Singleton
@Deprecated(since = "4.0.0")
public class StringVisitorModelInterpolator extends AbstractStringBasedModelInterpolator {
    @Inject
    public StringVisitorModelInterpolator(

# OpenAPI Webhooks

There are cases where you want to tell your API **users** that your app could call *their* app (sending a request) with some data, normally to **notify** of some type of **event**.

This means that instead of the normal process of your users sending requests to your API, it's **your API** (or your app) that could **send requests to their system** (to their API, their app).

This is normally called a **webhook**.

## Webhooks steps

   *
   * <p><b>Java 8+ users:</b> use {@link Float#BYTES} instead.
   *
   * @since 10.0
   */
  public static final int BYTES = Float.SIZE / Byte.SIZE;

  /**
   * Returns a hash code for {@code value}; equal to the result of invoking {@code ((Float)
   * value).hashCode()}.
   *
   * <p><b>Java 8+ users:</b> use {@link Float#hashCode(float)} instead.
   *
   * @param value a primitive {@code float} value

   *
   * <p><b>Java 8+ users:</b> use {@link Float#BYTES} instead.
   *
   * @since 10.0
   */
  public static final int BYTES = Float.SIZE / Byte.SIZE;

  /**
   * Returns a hash code for {@code value}; equal to the result of invoking {@code ((Float)
   * value).hashCode()}.
   *
   * <p><b>Java 8+ users:</b> use {@link Float#hashCode(float)} instead.
   *
   * @param value a primitive {@code float} value

		// Call the ServeHTTP to execute the handler.
		apiRouter.ServeHTTP(rec, req)
		if rec.Code != test.expectedStatus {
			t.Fatalf("Test %d: %s: Expected the response status to be `%d`, but instead found `%d`, Resp: %s", i+1, instanceType, test.expectedStatus, rec.Code, rec.Body)
		}
	}

	// Test cases for signature-V4.
	testCasesV4 := []struct {
		objectName         string
		data               []byte

/** Implementations of {@code Futures.catching*}. */
@GwtCompatible
@ElementTypesAreNonnullByDefault
@SuppressWarnings({
  // Whenever both tests are cheap and functional, it's faster to use &, | instead of &&, ||
  "ShortCircuitBoolean",
  "nullness", // TODO(b/147136275): Remove once our checker understands & and |.
})
abstract class AbstractCatchingFuture<

import org.apache.maven.model.building.ModelProblem.Version;

/**
 * Class to wrap request parameters to ModelProblemCollector.addProblem
 *
 * @deprecated use {@link org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public final class ModelProblemCollectorRequest {

    private final ModelProblem.Severity severity;
    private final ModelProblem.Version version;
    private Exception exception;