anchor.diff:  end;
   
   function TRedisClient.EXISTS(const AKey: string): boolean;
  -var
  -  R: string;
   begin
     NextCMD := GetCmdList('EXISTS');
     NextCMD.Add(AKey);
  
positive.code: var
    R: string;
    I: Integer;
    IsTimeout: boolean;
  begin
    if FInTransaction then
    begin
  
negative.code: var
    R: string;
    HowMany: Integer;
  begin
    AValidResponse := True;
    NextToken(R);
  