create a method and add it to a java class

Please show full context.

This line is most definitely not needed

VirtualFileManager.getInstance().refreshWithoutFileWatcher(true);

print is a method created by JavaFacade....getElementFactory.createMethod and c is a variable containing a PsiClass

I need to see the full class and invocation context

public class AbstractClassesDetection extends AnAction{
    private JButton next;
    RunnableHelper runnableHelper = new  RunnableHelper();
    JFrame mainWindow;
    MainFRame dual;
    Utilities utils = new Utilities();
    public AbstractClassesDetection(){

    }
    @Override
    public void actionPerformed(@NotNull AnActionEvent e) {
       
        Project project = e.getData(PlatformDataKeys.PROJECT);

        PsiFile psifile = PsiManager.getInstance(project).findFile(project.getWorkspaceFile());
         Path p = Paths.get(project.getBaseDir().findChild("src").getPath());
       
        
        List<PsiClass> projectPsiClasses = utils.walkOnPsiClasses(project);
        for(int i = 0; i < projectPsiClasses.size(); i++){
           if(utils.isAbstract(projectPsiClasses.get(i))) {
               System.out.println(((PsiJavaFile) projectPsiClasses.get(i).getContainingFile()).getPackageName() + "." + projectPsiClasses.get(i).getName());

               PsiClass c = projectPsiClasses.get(i);
               PsiMethod print = utils.createAbstractMethod("print", project);

               CommandProcessor cmdprocessor = CommandProcessor.getInstance();

               runnableHelper.runWriteCommand(project,new Runnable() {
             
                   @Override
                   public void run() {
                       
                      c.add(print);


                       PsiDocumentManager.getInstance(project).doPostponedOperationsAndUnblockDocument(PsiDocumentManager.getInstance(project).getDocument(c.getContainingFile()));
                       PsiDocumentManager.getInstance(project).commitDocument(PsiDocumentManager.getInstance(project).getDocument(c.getContainingFile()));
                       VirtualFileManager.getInstance().refreshWithoutFileWatcher(true);
                       

                   }
               });
           }
        }

        mainWindow =  new JFrame();
        mainWindow.setTitle("Detect Project ABstract Classes");
        next = new JButton("Next");

      
        next.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                mainWindow.hide();
            }
        });

      
        mainWindow.getContentPane().add(new DualListBox2(projectPsiClasses,project), BorderLayout.CENTER);
        mainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        mainWindow.setLocation(500,500);
        mainWindow.setSize(1200,1000);
        mainWindow.setVisible(true);


    }
}