public UpdateCostCategoryDefinitionRequest withRuleVersion(CostCategoryRuleVersion ruleVersion) {
        this.ruleVersion = ruleVersion.toString();
        return this;
    }
@param ruleVersion
@return Returns a reference to this object so that method calls can be chained together.
@see CostCategoryRuleVersion
aws-java-sdk-costexplorer/src/main/java/com/amazonaws/services/costexplorer/model/UpdateCostCategoryDefinitionRequest.java