public Ipam withTier(IpamTier tier) {
        this.tier = tier.toString();
        return this;
    }
<p>
IPAM is offered in a Free Tier and an Advanced Tier. For more information about the features available in each
tier and the costs associated with the tiers, see <a href="http://aws.amazon.com/vpc/pricing/">Amazon VPC pricing
&gt; IPAM tab</a>.
</p>

@param tier
       IPAM is offered in a Free Tier and an Advanced Tier. For more information about the features available in
       each tier and the costs associated with the tiers, see <a href="http://aws.amazon.com/vpc/pricing/">Amazon
       VPC pricing &gt; IPAM tab</a>.
@return Returns a reference to this object so that method calls can be chained together.
@see IpamTier
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/Ipam.java