问如何根据对象值返回布尔值？

EN

function transformPrice(oldDrugPrice) {
      let drugPrice =  {
            "drugName": "Metformin",
            "mailPrice": {
                "copayEmployer": "N/A",
                "totalQuantity": "90.0",
                "rejectMessage": [{
                    "settlementCode": "99",
                    "settlementDesc": "Not Covered: Call us - System could not process your request. Call us at the toll-free number on your benefit ID card.||Sin cobertura: Llámenos - El sistema no pudo procesar su solicitud. Llame al número gratuito que figura en su tarjeta de identificación de beneficios."
                }]
            },
            "retailPrice": {
                "copayEmployer": "N/A",
                "totalQuantity": "30.0"
            }
        },

      if (drugPrice.retailPrice.rejectMessage || drugPrice.mailPrice.rejectMessage.length ){
        const retailRejecrMsg = drugPrice.retailPrice.rejectMessage;
        const mailPriceMsg = drugPrice.mailPrice.rejectMessage;
         const retailErr = isErrorPresent(retailRejecrMsg);
         const mailErr =isErrorPresent(mailPriceMsg);

      }

      return drugPrice;
    }

function isErrorPresent (price) {
  const isError = function (element) {
    const bRet = checkErrorCodes(element);
    return (element.hasOwnProperty('settlementCode') && bRet)
  }

  return isError;
}

function checkErrorCodes(el){
  let bRet = false;
  const errorCodes = [
    10015,
    2356,
    225,
    224,
      99
  ]

  for (const err of errorCodes){

    if (err === el.settlementCode){

      bRet = true;
    }
  }
   return bRet;
}