@Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (obj == null)
      return false;
    if (getClass() != obj.getClass())
      return false;
    StringKey other = (StringKey) obj;
    if (m_name == null) {
      if (other.m_name != null)
        return false;
    } else if (!m_name.equals(other.m_name))
      return false;
    return true;
  }