public void setTr31KeyBlock(ImportTr31KeyBlock tr31KeyBlock) {
        this.tr31KeyBlock = tr31KeyBlock;
    }
<p>
Parameter information for key material import using symmetric TR-31 key exchange method.
</p>

@param tr31KeyBlock
       Parameter information for key material import using symmetric TR-31 key exchange method.
aws-java-sdk-paymentcryptography/src/main/java/com/amazonaws/services/paymentcryptography/model/ImportKeyMaterial.java