@Nullable
  default <T extends PsiElement> T getArgument(int index, @NotNull Class<T> argClass) {
    final PyAstExpression[] args = getArguments();
    return args.length > index ? ObjectUtils.tryCast(args[index], argClass) : null;
  }
@Nullable
  default <T extends PsiElement> T getArgument(int index, @NotNull Class<T> argClass)