public void setPropertyId(String propertyId) {
        this.propertyId = propertyId;
    }
<p>
The ID of the property to use as the variable. You can use the property <code>name</code> if it's from the same
asset model. If the property has an external ID, you can specify <code>externalId:</code> followed by the
external ID. For more information, see <a
href="https://docs.aws.amazon.com/iot-sitewise/latest/userguide/object-ids.html#external-ids">Using external
IDs</a> in the <i>IoT SiteWise User Guide</i>.
</p>

@param propertyId
       The ID of the property to use as the variable. You can use the property <code>name</code> if it's from the
       same asset model. If the property has an external ID, you can specify <code>externalId:</code> followed by
       the external ID. For more information, see <a
       href="https://docs.aws.amazon.com/iot-sitewise/latest/userguide/object-ids.html#external-ids">Using
       external IDs</a> in the <i>IoT SiteWise User Guide</i>.
aws-java-sdk-iotsitewise/src/main/java/com/amazonaws/services/iotsitewise/model/VariableValue.java