public void setIsSigned(Boolean isSigned) {
        this.isSigned = isSigned;
    }
<p>
Whether the message data is specified as a signed value.
</p>

@param isSigned
       Whether the message data is specified as a signed value.
aws-java-sdk-iotfleetwise/src/main/java/com/amazonaws/services/iotfleetwise/model/CanSignal.java