private static void addLookupItems(Set<LookupElement> lookupElements, @Nullable SuggestedNameInfo callback, PrefixMatcher matcher, Project project, String... strings) {
    outer:
    for (int i = 0; i < strings.length; i++) {
      String name = strings[i];
      if (!matcher.prefixMatches(name) || !PsiNameHelper.getInstance(project).isIdentifier(name, LanguageLevel.HIGHEST)) {
        continue;
      }

      for (LookupElement lookupElement : lookupElements) {
        if (lookupElement.getAllLookupStrings().contains(name)) {
          continue outer;
        }
      }

      LookupElement element = PrioritizedLookupElement.withPriority(LookupElementBuilder.create(name).withAutoCompletionPolicy(AutoCompletionPolicy.GIVE_CHANCE_TO_OVERWRITE), -i);
      if (callback != null) {
        element = withInsertHandler(callback, element);
      }
      lookupElements.add(element);
    }
  }
private static void addLookupItems(Set<LookupElement> lookupElements, @Nullable SuggestedNameInfo callback, PrefixMatcher matcher, Project project, String... strings)