public ModifyDBInstanceRequest withPromotionTier(Integer promotionTier) {
        setPromotionTier(promotionTier);
        return this;
    }
<p>
A value that specifies the order in which a Read 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>

@param promotionTier
       A value that specifies the order in which a Read 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
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-neptune/src/main/java/com/amazonaws/services/neptune/model/ModifyDBInstanceRequest.java