code: public void cloneTo (@Nonnull final PDBusinessCard ret)
    {
      ret.m_aParticipantIdentifier = m_aParticipantIdentifier;
      ret.m_aEntities = new CommonsArrayList <> (m_aEntities, PDBusinessEntity::getClone);
    }
docs: This method clones all values from <code>this</code> to the passed object.
  All data in the parameter object is overwritten!
  
  @param ret
  The target object to clone to. May not be <code>null</code>.