public void setReservedInstancesId(String reservedInstancesId) {
        this.reservedInstancesId = reservedInstancesId;
    }
<p>
The ID for the Reserved Instances that were created as part of the modification request. This field is only
available when the modification is fulfilled.
</p>

@param reservedInstancesId
       The ID for the Reserved Instances that were created as part of the modification request. This field is
       only available when the modification is fulfilled.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/ReservedInstancesModificationResult.java