T instance = invoke(factory, args);
    if (instance == null) {
      throw new FactoryMethodReturnsNullException(factory);
    }
    return instance;
  }

  private static <T> @Nullable T invoke(Invokable<?, ? extends T> factory, List<?> args)
      throws InvocationTargetException, IllegalAccessException {
    T returnValue = factory.invoke(null, args.toArray());
    if (returnValue == null) {

        }
      }
    }
  }

  /**
   * Sets the default value for {@code type}, when dummy value for a parameter of the same type
   * needs to be created in order to invoke a method or constructor. The default value isn't used in
   * testing {@link Object#equals} because more than one sample instances are needed for testing
   * inequality.
   */

        }
      }
    }
  }

  /**
   * Sets the default value for {@code type}, when dummy value for a parameter of the same type
   * needs to be created in order to invoke a method or constructor. The default value isn't used in
   * testing {@link Object#equals} because more than one sample instances are needed for testing
   * inequality.
   */

### Fixes

* 🐛 Fix support for unions when using `Form`. PR [#13827](https://github.com/fastapi/fastapi/pull/13827) by [@patrick91](https://github.com/patrick91).

### Docs

* ✏️ Fix grammar mistake in `docs/en/docs/advanced/response-directly.md`. PR [#13800](https://github.com/fastapi/fastapi/pull/13800) by [@NavesSapnis](https://github.com/NavesSapnis).