public String getLookBackPeriod() {
        return this.lookBackPeriod;
    }
<p>
The preference to control the number of days the utilization metrics of the Amazon Web Services resource are
analyzed. When this preference isn't specified, we use the default value <code>DAYS_14</code>.
</p>
<note>
<p>
You can only set this preference for the Amazon EC2 instance and Auto Scaling group resource types.
</p>
</note>

@return The preference to control the number of days the utilization metrics of the Amazon Web Services resource
        are analyzed. When this preference isn't specified, we use the default value <code>DAYS_14</code>. </p>
        <note>
        <p>
        You can only set this preference for the Amazon EC2 instance and Auto Scaling group resource types.
        </p>
@see LookBackPeriodPreference
aws-java-sdk-computeoptimizer/src/main/java/com/amazonaws/services/computeoptimizer/model/PutRecommendationPreferencesRequest.java