public String getDimensionName() {
        return this.dimensionName;
    }
<p>
The name of an Amazon CloudWatch dimension associated with an email sending metric. The name has to meet the
following criteria:
</p>
<ul>
<li>
<p>
It can only contain ASCII letters (a-z, A-Z), numbers (0-9), underscores (_), or dashes (-).
</p>
</li>
<li>
<p>
It can contain no more than 256 characters.
</p>
</li>
</ul>

@return The name of an Amazon CloudWatch dimension associated with an email sending metric. The name has to meet
        the following criteria:</p>
        <ul>
        <li>
        <p>
        It can only contain ASCII letters (a-z, A-Z), numbers (0-9), underscores (_), or dashes (-).
        </p>
        </li>
        <li>
        <p>
        It can contain no more than 256 characters.
        </p>
        </li>
aws-java-sdk-pinpointemail/src/main/java/com/amazonaws/services/pinpointemail/model/CloudWatchDimensionConfiguration.java