@Override
  public boolean equals(Object obj) {
    if (this == obj) return true;
    if (obj == null) return false;

    if (obj instanceof DescribeVpcAttributeResult == false) return false;
    DescribeVpcAttributeResult other = (DescribeVpcAttributeResult) obj;

    if (other.getVpcId() == null ^ this.getVpcId() == null) return false;
    if (other.getVpcId() != null && other.getVpcId().equals(this.getVpcId()) == false) return false;
    if (other.isEnableDnsSupport() == null ^ this.isEnableDnsSupport() == null) return false;
    if (other.isEnableDnsSupport() != null
        && other.isEnableDnsSupport().equals(this.isEnableDnsSupport()) == false) return false;
    if (other.isEnableDnsHostnames() == null ^ this.isEnableDnsHostnames() == null) return false;
    if (other.isEnableDnsHostnames() != null
        && other.isEnableDnsHostnames().equals(this.isEnableDnsHostnames()) == false) return false;
    return true;
  }