Method complete

src/helper.rs:386–406

(
        &self,
        line: &str,
        pos: usize,
        ctx: &Context<'_>,
    )

impl Completer for MyHelper {
    type Candidate = Pair;
    fn complete(
        &self,
        line: &str,
        pos: usize,
        ctx: &Context<'_>,
    ) -> Result<(usize, Vec<Pair>), ReadlineError> {
        match partial_parse(line, pos, self) {
            Some((pos, Partial::Call(canister_id, meth))) => {
                let mut map = self.canister_map.borrow_mut();
                Ok(match map.get(&self.agent, &canister_id) {
                    Ok(info) => (pos, info.match_method(&meth)),
                    Err(_) => (pos, Vec::new()),
                })
            }
            Some((pos, Partial::Val(v, rest))) => Ok((pos, match_selector(&v, &rest))),
            _ => match match_type(line, self) {
                Some(res) => Ok(res),
                None => self.completer.complete(line, pos, ctx),
            },
        }
    }
}

fn match_type(line: &str, helper: &MyHelper) -> Option<(usize, Vec<Pair>)> {