public String getAccountId() {
        return this.accountId;
    }
<p>
The <code>AccountId</code> value is the AWS account ID of the account that owns the vault. You can either specify
an AWS account ID or optionally a single '<code>-</code>' (hyphen), in which case Amazon S3 Glacier uses the AWS
account ID associated with the credentials used to sign the request. If you use an account ID, do not include any
hyphens ('-') in the ID.
</p>

@return The <code>AccountId</code> value is the AWS account ID of the account that owns the vault. You can either
        specify an AWS account ID or optionally a single '<code>-</code>' (hyphen), in which case Amazon S3
        Glacier uses the AWS account ID associated with the credentials used to sign the request. If you use an
        account ID, do not include any hyphens ('-') in the ID.
aws-java-sdk-glacier/src/main/java/com/amazonaws/services/glacier/model/DeleteVaultNotificationsRequest.java