anchor.diff:  begin
     FAnalysisState := TDLAnalysisState.Create(projectInfo, fileName, line, column);
   end; { TDLUserInterface.Initialize }
  +
  +procedure TDLUserInterface.ProcessExecuteAction(
  +  const uixStorage: IDLUIXStorage; const currentLocation: TDLUIXLocation;
  +  var navigateTo: Nullable<TDLUIXLocation>);
  +var
  +  navigation: IDLUIXNavigationAction;
  +begin
  +  if assigned(ExecuteAction) then begin
  +    if Supports(ExecuteAction, IDLUIXNavigationAction, navigation) then begin
  +      navigateTo := TDLUIXLocation.Create(navigation.Location.FileName,
  +        navigation.Location.UnitName,
  +        navigation.Location.Line, navigation.Location.Column);
  +      if navigation.IsBackNavigation then
  +        uixStorage.History.Remove(navigateTo)
  +      else
  +        uixStorage.History.Add(TDLUIXLocation.Create(currentLocation));
  +    end;
  +  end;
  +end; { TDLUserInterface.ProcessExecuteAction }
   
   procedure TDLUserInterface.ShowAnalyzerPanel(const parentFrame: IDLUIXFrame;
     const parentAction: IDLUIXAction; const analyzer: IDLUIXAnalyzer);
  
positive.code:   try
      ui.Initialize(projectInfo, currentLocation.UnitName, currentLocation.line, currentLocation.column);
      ui.ShowMain;
      if assigned(ui.ExecuteAction) then begin
        if Supports(ui.ExecuteAction, IDLUIXNavigationAction, navigation) then begin
          navigateTo := TDLUIXLocation.Create(navigation.Location.FileName,
            navigation.Location.UnitName,
            navigation.Location.Line, navigation.Location.Column);
          if navigation.IsBackNavigation then
            uixStorage.History.Remove(navigateTo)
          else
            uixStorage.History.Add(TDLUIXLocation.Create(currentLocation));
        end;
      end  ;
    finally FreeAndNil(ui); end;
  end; { DLUIShowUI }
  
  
negative.code: procedure DLUIShowUI(const uixStorage: IDLUIXStorage; const projectInfo: IDLScanResult;
    const currentLocation: TDLUIXLocation; var navigateTo: Nullable<TDLUIXLocation>);
  var
    analyzers: TDLAnalyzers;
    ui       : TDLUserInterface;
  begin
    navigateTo := nil;
  
  