@Nullable
    final CharsetMatch createMatch(LanguageLevel languageLevel, PsiMethod method, PsiExpressionList arguments) {
      PsiExpression argument = arguments.getExpressions()[myCharsetParameterIndex];
      PsiClass aClass = method.getContainingClass();
      if (aClass == null) return null;

      PsiMethod[] candidates = method.isConstructor() ? aClass.getConstructors() : aClass.findMethodsByName(method.getName(), false);
      PsiMethod charsetMethod = Arrays.stream(candidates)
        .filter(psiMethod -> checkMethod(psiMethod, "java.nio.charset.Charset"))
        .filter(psiMethod -> LanguageLevelUtil.getLastIncompatibleLanguageLevel(psiMethod, languageLevel) == null)
        .findFirst().orElse(null);
      if (charsetMethod == null) return null;
      return new CharsetMatch(argument, method, charsetMethod);
    }
@Nullable
    final CharsetMatch createMatch(LanguageLevel languageLevel, PsiMethod method, PsiExpressionList arguments)