code: public static void hideUploadButtonWhenNeeded(final Page page, final Session session,
        final UserManager userManager,
        final Boolean lockdownUploadProjects) {
      final User user = session.getUser();
  
      if (lockdownUploadProjects && !UserUtils.hasPermissionforAction(userManager, user,
          Permission.Type.UPLOADPROJECTS)) {
        page.add("hideUploadProject", true);
      }
    }
docs: Method hides the upload button for regular users from relevant pages when the property
  "lockdown.upload.projects" is set. The button is displayed for admin users and users with
  upload permissions.