@Nullable
  String getPropertyDescription(final @NotNull PsiElement element, final @Nullable String name) {
    final RegExpLanguageHost host = findRegExpHost(element);
    return host != null ?  host.getPropertyDescription(name) : myDefaultProvider.getPropertyDescription(name);
  }
@Nullable
  String getPropertyDescription(final @NotNull PsiElement element, final @Nullable String name)