public void setOperator(String operator) {
        this.operator = operator;
    }
<p>
The matching operator for an IP condition expression.
</p>

@param operator
       The matching operator for an IP condition expression.
@see IngressIpOperator
aws-java-sdk-mailmanager/src/main/java/com/amazonaws/services/mailmanager/model/IngressIpv4Expression.java