return (TypeToken<? extends R>) TypeToken.of(getGenericReturnType());
  }

  /**
   * Returns all declared parameters of this {@code Invokable}. Note that if this is a constructor
   * of a non-static inner class, unlike {@link Constructor#getParameterTypes}, the hidden {@code
   * this} parameter of the enclosing class is excluded from the returned parameters.
   */
  @IgnoreJRERequirement