_usedProperties['class'] = true; $this->class = $value; return $this; } public function __construct(array $value = []) { if (array_key_exists('class', $value)) { $this->_usedProperties['class'] = true; $this->class = $value['class']; unset($value['class']); } if ([] !== $value) { throw new InvalidConfigurationException(sprintf('The following keys are not supported by "%s": ', __CLASS__).implode(', ', array_keys($value))); } } public function toArray(): array { $output = []; if (isset($this->_usedProperties['class'])) { $output['class'] = $this->class; } return $output; } }