code: public java.util.List<String> getUnassignedIpv6Addresses() {
          if (unassignedIpv6Addresses == null) {
              unassignedIpv6Addresses = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return unassignedIpv6Addresses;
      }
docs: <p>
  The IPv6 addresses that have been unassigned from the network interface.
  </p>
  
  @return The IPv6 addresses that have been unassigned from the network interface.