options[$property] ?? $default; } public function extend(array $options): Config { return new Config(array_merge($this->options, $options)); } public function withDefaults(array $defaults): Config { return new Config($this->options + $defaults); } public function toArray(): array { return $this->options; } public function withSetting(string $property, mixed $setting): Config { return $this->extend([$property => $setting]); } public function withoutSettings(string ...$settings): Config { return new Config(array_diff_key($this->options, array_flip($settings))); } }