public void setSystemInstanceId(String systemInstanceId) {
        this.systemInstanceId = systemInstanceId;
    }
<p>
The ID of the system instance that contains the flow.
</p>

@param systemInstanceId
       The ID of the system instance that contains the flow.
aws-java-sdk-iotthingsgraph/src/main/java/com/amazonaws/services/iotthingsgraph/model/FlowExecutionSummary.java