public void setPhoneNumberCountryCodes(java.util.Collection<String> phoneNumberCountryCodes) {
        if (phoneNumberCountryCodes == null) {
            this.phoneNumberCountryCodes = null;
            return;
        }

        this.phoneNumberCountryCodes = new java.util.ArrayList<String>(phoneNumberCountryCodes);
    }
<p>
The ISO country code.
</p>

@param phoneNumberCountryCodes
       The ISO country code.
@see PhoneNumberCountryCode
aws-java-sdk-connect/src/main/java/com/amazonaws/services/connect/model/ListPhoneNumbersRequest.java