public Usage withOperation(String operation) {
        setOperation(operation);
        return this;
    }
<p>
The operation value.
</p>

@param operation
       The operation value.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-costoptimizationhub/src/main/java/com/amazonaws/services/costoptimizationhub/model/Usage.java