- **Resource management** - Proper handling of resources with utilities like `CloseableUtil` and `DisposableUtil`

### Key Architectural Patterns
- **Factory Pattern** - `BeanDescFactory` for creating bean descriptors, `ParameterizedClassDescFactory` for generic type handling
- **Builder Pattern** - `CopyOptions` for configuring bean copying operations with fluent API

   * the event source has already been closed or canceled.
   */
  fun cancel()

  fun interface Factory {
    /**
     * Creates a new event source and immediately returns it. Creating an event source initiates an
     * asynchronous process to connect the socket. Once that succeeds or fails, `listener` will be
     * notified. The caller must cancel the returned event source when it is no longer in use.
     */

   * symmetry. Moreover, we don't want to reconstruct a native type variable {@code <A>} using our
   * implementation unless some of its bounds have changed in resolution. This avoids creating
   * unequal TypeVariable implementation unnecessarily. When the bounds do change, however, it's
   * fine for the synthetic TypeVariable to be unequal to any native TypeVariable anyway.
   */

    }

    // Test ProcessDestroyer inner class
    public void test_processDestroyer_creation() throws Exception {
        // We can't directly test ProcessDestroyer without creating actual processes,
        // but we can test that the class exists and basic functionality
        try {
            // Use reflection to verify ProcessDestroyer class exists

   * symmetry. Moreover, we don't want to reconstruct a native type variable {@code <A>} using our
   * implementation unless some of its bounds have changed in resolution. This avoids creating
   * unequal TypeVariable implementation unnecessarily. When the bounds do change, however, it's
   * fine for the synthetic TypeVariable to be unequal to any native TypeVariable anyway.
   */

         * @return the built result object
         */
        T build(B requestBuilder, long execTime, OptionalEntity<R> response);
    }

    /**
     * Interface for creating entities from search response hits.
     *
     * @param <T> the entity type
     * @param <R> the response type
     * @param <H> the hit type
     */
    public interface EntityCreator<T, R, H> {