boolean (final PsiClass outerClass, final PsiElement targetContainer) { if (outerClass.isInterface()) { return true; } if (targetContainer instanceof PsiDirectory) { final PsiPackage targetPackage = JavaDirectoryService.getInstance().getPackage((PsiDirectory)targetContainer); final JavaPsiFacade psiFacade = JavaPsiFacade.getInstance(outerClass.getProject()); if (targetPackage != null && !psiFacade.isInPackage(outerClass, targetPackage)) { return true; } } return false; }