public EstimateByTime withCurrency(String currency) {
        setCurrency(currency);
        return this;
    }
<p>
The currency of the estimate in USD.
</p>

@param currency
       The currency of the estimate in USD.
@return Returns a reference to this object so that method calls can be chained together.
@see Currency
aws-java-sdk-lightsail/src/main/java/com/amazonaws/services/lightsail/model/EstimateByTime.java