anchor.diff:      procedure SetLogFile(const Value : string);
       procedure SetLogging(Value : Boolean);
       procedure Unlock;
  +    class function GetMaxFileSize: Int64; virtual;
  +   	class Function SupportsEmptyFolder: Boolean; virtual;
  +
   
     protected {abstract methods}
       function CreateItem(const FileSpec : string): TAbArchiveItem;
  
positive.code:     FLastModFileDate  : Word;
      FTagged           : Boolean;
      FUncompressedSize : Int64;
  
    protected {property methods}
      function GetCompressedSize : Int64; virtual;
      function GetCRC32 : Longint; virtual;
  
negative.code:     destructor Destroy; override;
      function MatchesDiskName(const FileMask : string) : Boolean;
      function MatchesStoredName(const FileMask : string) : Boolean;
      function MatchesStoredNameEx(const FileMask : string) : Boolean;
  
  
    public {properties}
  