units = $units; } /** * @return string */ public function getUnits() { return $this->units; } /** * @param float */ public function setValue($value) { $this->value = $value; } /** * @return float */ public function getValue() { return $this->value; } } // Adding a class alias for backwards compatibility with the previous class name. class_alias(Concentration::class, 'Google_Service_AirQuality_Concentration');