public void setOperation(String operation) {
        this.operation = operation;
    }
<p>
Operation is the specific Amazon Web Services action covered by this line item. This describes the specific usage
of the line item.
</p>
<p>
If the <code>Scope</code> attribute is set to <code>SKU</code>, this attribute indicates which operation the
<code>PricingRule</code> is modifying. For example, a value of <code>RunInstances:0202</code> indicates the
operation of running an Amazon EC2 instance.
</p>

@param operation
       Operation is the specific Amazon Web Services action covered by this line item. This describes the
       specific usage of the line item.</p>
       <p>
       If the <code>Scope</code> attribute is set to <code>SKU</code>, this attribute indicates which operation
       the <code>PricingRule</code> is modifying. For example, a value of <code>RunInstances:0202</code>
       indicates the operation of running an Amazon EC2 instance.
aws-java-sdk-billingconductor/src/main/java/com/amazonaws/services/billingconductor/model/CreatePricingRuleRequest.java