@Override
    public String toString() {
        return this.value;
    }
Enum listing out all supported destination phone number verification statuses. The following enum values are
supported. 1. PENDING : The destination phone number is pending verification. 2. VERIFIED : The destination phone
number is verified.
aws-java-sdk-sns/src/main/java/com/amazonaws/services/sns/model/SMSSandboxPhoneNumberVerificationStatus.java