public void setTransactionId(String transactionId) {
        this.transactionId = transactionId;
    }
<p>
The ID of the call transaction.
</p>

@param transactionId
       The ID of the call transaction.
aws-java-sdk-chimesdkvoice/src/main/java/com/amazonaws/services/chimesdkvoice/model/UpdateSipMediaApplicationCallRequest.java