content: Function valid_featured_playlist() as String
    playlist_id = m.config.featured_playlist_id
    if playlist_id = invalid
      return "false"
    else
      return "true"
    endif
  end Function
  
  Function valid_category() as String
    category_id = m.config.category_id
  
    if category_id = invalid
      return "false"
    else
      return "true"
    end if
  end Function
  
  Function valid_top_zobject() as String
    zobject = m.config.top_description_zobject
  
    if zobject = invalid
      return "false"
    else
      return "true"
    end if
  end Function
  
  Function valid_bottom_zobject() as String
    zobject = m.config.bottom_description_zobject
  
    if zobject = invalid
      return "false"
    else
      return "true"
    end if
  end Function
  