public UsageByAccount withCurrency(Currency currency) {
        this.currency = currency.toString();
        return this;
    }
<p>
The type of currency that the value for the metric (estimatedCost) is reported in.
</p>

@param currency
       The type of currency that the value for the metric (estimatedCost) is reported in.
@return Returns a reference to this object so that method calls can be chained together.
@see Currency
aws-java-sdk-macie2/src/main/java/com/amazonaws/services/macie2/model/UsageByAccount.java