public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) { if (!CodeInsightUtilBase.preparePsiElementForWrite(descriptor.getPsiElement())) return; final PsiMethod psiMethod = PsiTreeUtil.getParentOfType(descriptor.getPsiElement(), PsiMethod.class); if (psiMethod != null) { final ArrayList<PsiElement> psiParameters = new ArrayList<PsiElement>(); final RefElement refMethod = myManager != null ? myManager.getReference(psiMethod) : null; if (refMethod != null) { for (final RefParameter refParameter : getUnusedParameters((RefMethod) refMethod)) { psiParameters.add(refParameter.getElement()); } } else { final PsiParameter[] parameters = psiMethod.getParameterList().getParameters(); for (PsiParameter parameter : parameters) { if (Comparing.strEqual(parameter.getName(), myHint)) { psiParameters.add(parameter); break; } } } final PsiModificationTracker tracker = psiMethod.getManager().getModificationTracker(); final long startModificationCount = tracker.getModificationCount(); removeUnusedParameterViaChangeSignature(psiMethod, psiParameters); if (refMethod != null && startModificationCount != tracker.getModificationCount()) { myProcessor.ignoreElement(refMethod); } } }