public ImportTr34KeyBlock withImportToken(String importToken) {
        setImportToken(importToken);
        return this;
    }
<p>
The import token that initiates key import using the asymmetric TR-34 key exchange method into Amazon Web
Services Payment Cryptography. It expires after 7 days. You can use the same import token to import multiple keys
to the same service account.
</p>

@param importToken
       The import token that initiates key import using the asymmetric TR-34 key exchange method into Amazon Web
       Services Payment Cryptography. It expires after 7 days. You can use the same import token to import
       multiple keys to the same service account.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-paymentcryptography/src/main/java/com/amazonaws/services/paymentcryptography/model/ImportTr34KeyBlock.java