public Integer getPromotionTier() {
        return this.promotionTier;
    }
<p>
A value that specifies the order in which an Amazon DocumentDB replica is promoted to the primary instance after
a failure of the existing primary instance.
</p>
<p>
Default: 1
</p>
<p>
Valid values: 0-15
</p>

@return A value that specifies the order in which an Amazon DocumentDB replica is promoted to the primary
        instance after a failure of the existing primary instance.</p>
        <p>
        Default: 1
        </p>
        <p>
        Valid values: 0-15
aws-java-sdk-docdb/src/main/java/com/amazonaws/services/docdb/model/ModifyDBInstanceRequest.java