/**
  * @param PlanDefinition $definition
  * @param Money $amountToPay
  * @param PlanParameters $parameters
  * @return bool
  */
 public function isAvailable(PlanDefinition $definition, Money $amountToPay, PlanParameters $parameters)
 {
     return $this->childCalculator->isAvailable($definition, $amountToPay, $parameters);
 }