public void setId(String id) {
        this.id = id;
    }
<p>
A short name that identifies the object's results in the response. This name must be unique among all
<code>MetricDataQuery</code> objects specified for a single scaling policy. If you are performing math
expressions on this set of data, this name represents that data and can serve as a variable in the mathematical
expression. The valid characters are letters, numbers, and underscores. The first character must be a lowercase
letter.
</p>

@param id
       A short name that identifies the object's results in the response. This name must be unique among all
       <code>MetricDataQuery</code> objects specified for a single scaling policy. If you are performing math
       expressions on this set of data, this name represents that data and can serve as a variable in the
       mathematical expression. The valid characters are letters, numbers, and underscores. The first character
       must be a lowercase letter.
aws-java-sdk-autoscaling/src/main/java/com/amazonaws/services/autoscaling/model/MetricDataQuery.java