List<M> () { if (getMember() == null) return Collections.emptyList(); final Ref<List<M>> callers = new Ref<>(); if (!ProgressManager.getInstance().runProcessWithProgressSynchronously(() -> ApplicationManager.getApplication().runReadAction(() -> callers.set(ContainerUtil.filter(computeCallers(), getFilter()))), RefactoringBundle.message("caller.chooser.looking.for.callers"), true, myProject)) { myCancelCallback.run(); return Collections.emptyList(); } return callers.get(); }