private static @NotNull String getGenericParameters(PsiMethodCallExpression call) {
      PsiClassType callType = tryCast(call.getType(), PsiClassType.class);
      if (!PsiTypesUtil.classNameEquals(callType, JAVA_UTIL_COMPARATOR)) return "";
      PsiType[] parameters = callType.getParameters();
      if (parameters.length != 1) return "";
      PsiClassType entryClass = tryCast(parameters[0], PsiClassType.class);
      if (!PsiTypesUtil.classNameEquals(entryClass, JAVA_UTIL_MAP_ENTRY)) return "";
      PsiType[] entryClassParameters = entryClass.getParameters();
      if (entryClassParameters.length != 2) return "";
      return "<" + entryClassParameters[0].getCanonicalText() + "," + entryClassParameters[1].getCanonicalText() + ">";
    }
private static @NotNull String getGenericParameters(PsiMethodCallExpression call)