public Expression getFilter() {
        return this.filter;
    }
<p>
Filters utilization data by dimensions. You can filter by the following dimensions:
</p>
<ul>
<li>
<p>
AZ
</p>
</li>
<li>
<p>
CACHE_ENGINE
</p>
</li>
<li>
<p>
DEPLOYMENT_OPTION
</p>
</li>
<li>
<p>
INSTANCE_TYPE
</p>
</li>
<li>
<p>
LINKED_ACCOUNT
</p>
</li>
<li>
<p>
OPERATING_SYSTEM
</p>
</li>
<li>
<p>
PLATFORM
</p>
</li>
<li>
<p>
REGION
</p>
</li>
<li>
<p>
SERVICE
</p>
</li>
<li>
<p>
SCOPE
</p>
</li>
<li>
<p>
TENANCY
</p>
</li>
</ul>
<p>
<code>GetReservationUtilization</code> uses the same <a
href="https://docs.aws.amazon.com/aws-cost-management/latest/APIReference/API_Expression.html">Expression</a>
object as the other operations, but only <code>AND</code> is supported among each dimension, and nesting is
supported up to only one level deep. If there are multiple values for a dimension, they are OR'd together.
</p>

@return Filters utilization data by dimensions. You can filter by the following dimensions:</p>
        <ul>
        <li>
        <p>
        AZ
        </p>
        </li>
        <li>
        <p>
        CACHE_ENGINE
        </p>
        </li>
        <li>
        <p>
        DEPLOYMENT_OPTION
        </p>
        </li>
        <li>
        <p>
        INSTANCE_TYPE
        </p>
        </li>
        <li>
        <p>
        LINKED_ACCOUNT
        </p>
        </li>
        <li>
        <p>
        OPERATING_SYSTEM
        </p>
        </li>
        <li>
        <p>
        PLATFORM
        </p>
        </li>
        <li>
        <p>
        REGION
        </p>
        </li>
        <li>
        <p>
        SERVICE
        </p>
        </li>
        <li>
        <p>
        SCOPE
        </p>
        </li>
        <li>
        <p>
        TENANCY
        </p>
        </li>
        </ul>
        <p>
        <code>GetReservationUtilization</code> uses the same <a
        href="https://docs.aws.amazon.com/aws-cost-management/latest/APIReference/API_Expression.html"
        >Expression</a> object as the other operations, but only <code>AND</code> is supported among each
        dimension, and nesting is supported up to only one level deep. If there are multiple values for a
        dimension, they are OR'd together.
aws-java-sdk-costexplorer/src/main/java/com/amazonaws/services/costexplorer/model/GetReservationUtilizationRequest.java