code: public LaunchTemplateInstanceNetworkInterfaceSpecificationRequest withIpv6Addresses(InstanceIpv6AddressRequest... ipv6Addresses) {
          if (this.ipv6Addresses == null) {
              setIpv6Addresses(new com.amazonaws.internal.SdkInternalList<InstanceIpv6AddressRequest>(ipv6Addresses.length));
          }
          for (InstanceIpv6AddressRequest ele : ipv6Addresses) {
              this.ipv6Addresses.add(ele);
          }
          return this;
      }
docs: <p>
  One or more specific IPv6 addresses from the IPv6 CIDR block range of your subnet. You can't use this option if
  you're specifying a number of IPv6 addresses.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setIpv6Addresses(java.util.Collection)} or {@link #withIpv6Addresses(java.util.Collection)} if you want
  to override the existing values.
  </p>
  
  @param ipv6Addresses
  One or more specific IPv6 addresses from the IPv6 CIDR block range of your subnet. You can't use this
  option if you're specifying a number of IPv6 addresses.
  @return Returns a reference to this object so that method calls can be chained together.