anchor.diff:      Result := FValue;
   end;
   
  -function TNullableInteger.ToString: String;
  +function TNullableInteger.AsString: String;
   begin
     if Self.IsNull then
       Result := ''
  
positive.code:     Self.Value:= SysUtils.Trim(Self.Value);
  end;
  
  function TNullableString.ToString: String;
  begin
    if Self.IsNull then
      Result := ''
  
negative.code:     Result := FValue;
  end;
  
  function TNullableDateTime.AsString(aShowTime: boolean): String;
  begin
    if Self.IsNull then
      Result := ''
  