public void setStrategy(String strategy) {
        this.strategy = strategy;
    }
<p>
The strategy to use for the instance refresh. The only valid value is <code>Rolling</code>.
</p>

@param strategy
       The strategy to use for the instance refresh. The only valid value is <code>Rolling</code>.
@see RefreshStrategy
aws-java-sdk-autoscaling/src/main/java/com/amazonaws/services/autoscaling/model/StartInstanceRefreshRequest.java