Prado\TPropertyValue::ensureFloat PHP Метод

    public static function ensureFloat($value)
    {
        return (double) $value;
    }

 /**
  * Sets the decay rate between callback. Default is 0;
  * @param float decay rate between callbacks.
  */
 public function setDecayRate($value)
 {
     $decay = TPropertyValue::ensureFloat($value);
     if ($decay < 0) {
         throw new TConfigurationException('callback_decay_be_not_negative', $this->getID());
     }
     $this->setViewState('Decay', $decay);
 }