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

@param systemInstanceId
       The ID of the system instance that contains the flow.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-iotthingsgraph/src/main/java/com/amazonaws/services/iotthingsgraph/model/FlowExecutionSummary.java