extern crate std;
use crate::{Reader, ReaderOptions};
use rdf_format::Format;
use std::{boxed::Box, io::Result, string::String};
#[stability::unstable]
pub fn open_url(_input_url: &String, options: Option<ReaderOptions>) -> Result<Box<dyn Reader>> {
let options = options.unwrap_or_default();
let _input_format = options.format.unwrap_or_else(|| Format::Turtle);
todo!() }