public AssociateVpcCidrBlockRequest withIpv6NetmaskLength(Integer ipv6NetmaskLength) {
        setIpv6NetmaskLength(ipv6NetmaskLength);
        return this;
    }
<p>
The netmask length of the IPv6 CIDR you would like to associate from an Amazon VPC IP Address Manager (IPAM)
pool. For more information about IPAM, see <a
href="https://docs.aws.amazon.com/vpc/latest/ipam/what-is-it-ipam.html">What is IPAM?</a> in the <i>Amazon VPC
IPAM User Guide</i>.
</p>

@param ipv6NetmaskLength
       The netmask length of the IPv6 CIDR you would like to associate from an Amazon VPC IP Address Manager
       (IPAM) pool. For more information about IPAM, see <a
       href="https://docs.aws.amazon.com/vpc/latest/ipam/what-is-it-ipam.html">What is IPAM?</a> in the <i>Amazon
       VPC IPAM User Guide</i>.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/AssociateVpcCidrBlockRequest.java