public java.util.List<String> getRegions() {
        if (regions == null) {
            regions = new com.amazonaws.internal.SdkInternalList<String>();
        }
        return regions;
    }
<p>
Returns a list of all Amazon Web Services Regions the given StackSet has stack instances deployed in. The Amazon
Web Services Regions list output is in no particular order.
</p>

@return Returns a list of all Amazon Web Services Regions the given StackSet has stack instances deployed in. The
        Amazon Web Services Regions list output is in no particular order.
aws-java-sdk-cloudformation/src/main/java/com/amazonaws/services/cloudformation/model/StackSet.java