final protected function getOptionalSpec()

in src/request-parameters/RequestParametersBase.php [47:57]


  final protected function getOptionalSpec<T as RequestParameter>(
    classname<T> $class,
    string $name,
  ): T {
    invariant(
      C\contains_key($this->optionalSpecs, $name),
      '%s is not an optional parameter',
      $name,
    );
    return self::getSpec($this->optionalSpecs, $class, $name);
  }