public boolean isMethodSignatureExists() {
   PsiClass target = myTargetMethod.getContainingClass();
   LOG.assertTrue(target != null);
   PsiMethod[] methods = target.findMethodsByName(myTargetMethod.getName(), false);
   for (PsiMethod method : methods) {
     if (PsiUtil.isApplicable(method, PsiSubstitutor.EMPTY, myExpressions)) return true;
   }
   return false;
 }
 @NotNull
 private List<PsiMethod> getMethodsToImport() {
   PsiShortNamesCache cache = PsiShortNamesCache.getInstance(myMethodCall.getProject());
   PsiMethodCallExpression element = myMethodCall.getElement();
   PsiReferenceExpression reference = element.getMethodExpression();
   PsiExpressionList argumentList = element.getArgumentList();
   String name = reference.getReferenceName();
   List<PsiMethod> list = new ArrayList<PsiMethod>();
   if (name == null) return list;
   GlobalSearchScope scope = element.getResolveScope();
   PsiMethod[] methods = cache.getMethodsByNameIfNotMoreThan(name, scope, 20);
   List<PsiMethod> applicableList = new ArrayList<PsiMethod>();
   final PsiResolveHelper resolveHelper =
       JavaPsiFacade.getInstance(element.getProject()).getResolveHelper();
   for (PsiMethod method : methods) {
     ProgressManager.checkCanceled();
     if (JavaCompletionUtil.isInExcludedPackage(method)) continue;
     if (!method.hasModifierProperty(PsiModifier.STATIC)) continue;
     PsiFile file = method.getContainingFile();
     if (file instanceof PsiJavaFile
         // do not show methods from default package
         && ((PsiJavaFile) file).getPackageName().length() != 0
         && PsiUtil.isAccessible(method, element, method.getContainingClass())) {
       list.add(method);
       PsiSubstitutor substitutorForMethod =
           resolveHelper.inferTypeArguments(
               method.getTypeParameters(),
               method.getParameterList().getParameters(),
               argumentList.getExpressions(),
               PsiSubstitutor.EMPTY,
               element.getParent(),
               DefaultParameterTypeInferencePolicy.INSTANCE);
       if (PsiUtil.isApplicable(method, substitutorForMethod, argumentList)) {
         applicableList.add(method);
       }
     }
   }
   List<PsiMethod> result = applicableList.isEmpty() ? list : applicableList;
   for (int i = result.size() - 1; i >= 0; i--) {
     ProgressManager.checkCanceled();
     PsiMethod method = result.get(i);
     PsiClass containingClass = method.getContainingClass();
     for (int j = i + 1; j < result.size(); j++) {
       PsiMethod exMethod = result.get(j);
       if (!Comparing.strEqual(exMethod.getName(), method.getName())) continue;
       PsiClass exContainingClass = exMethod.getContainingClass();
       if (containingClass != null
           && exContainingClass != null
           && !Comparing.equal(
               containingClass.getQualifiedName(), exContainingClass.getQualifiedName())) continue;
       // same named methods, drop one
       result.remove(i);
       break;
     }
     // check for manually excluded
     if (isExcluded(method)) {
       result.remove(i);
     }
   }
   Collections.sort(result, new PsiProximityComparator(argumentList));
   return result;
 }