public void setNumberExpression(RuleNumberExpression numberExpression) {
        this.numberExpression = numberExpression;
    }
<p>
The condition applies to a number expression passed in this field.
</p>

@param numberExpression
       The condition applies to a number expression passed in this field.
aws-java-sdk-mailmanager/src/main/java/com/amazonaws/services/mailmanager/model/RuleCondition.java