public ListServiceInstancesRequest withSortOrder(String sortOrder) {
        setSortOrder(sortOrder);
        return this;
    }
<p>
Result list sort order.
</p>
<p>
Default: <code>ASCENDING</code>
</p>

@param sortOrder
       Result list sort order.</p>
       <p>
       Default: <code>ASCENDING</code>
@return Returns a reference to this object so that method calls can be chained together.
@see SortOrder
aws-java-sdk-proton/src/main/java/com/amazonaws/services/proton/model/ListServiceInstancesRequest.java