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

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

    if (other.getInstanceIds() == null ^ this.getInstanceIds() == null) return false;
    if (other.getInstanceIds() != null
        && other.getInstanceIds().equals(this.getInstanceIds()) == false) return false;
    if (other.getFilters() == null ^ this.getFilters() == null) return false;
    if (other.getFilters() != null && other.getFilters().equals(this.getFilters()) == false)
      return false;
    return true;
  }