public void setTimePeriod(DateInterval timePeriod) {
        this.timePeriod = timePeriod;
    }
<p>
Sets the start and end dates for retrieving Reserved Instance (RI) utilization. The start date is inclusive, but
the end date is exclusive. For example, if <code>start</code> is <code>2017-01-01</code> and <code>end</code> is
<code>2017-05-01</code>, then the cost and usage data is retrieved from <code>2017-01-01</code> up to and
including <code>2017-04-30</code> but not including <code>2017-05-01</code>.
</p>

@param timePeriod
       Sets the start and end dates for retrieving Reserved Instance (RI) utilization. The start date is
       inclusive, but the end date is exclusive. For example, if <code>start</code> is <code>2017-01-01</code>
       and <code>end</code> is <code>2017-05-01</code>, then the cost and usage data is retrieved from
       <code>2017-01-01</code> up to and including <code>2017-04-30</code> but not including
       <code>2017-05-01</code>.
aws-java-sdk-costexplorer/src/main/java/com/amazonaws/services/costexplorer/model/GetReservationUtilizationRequest.java