Get start and end of the rule in Error.

[FerrisWasTaken]

How do I get the start and end of a rule from an Error.
For example
grammar.pest

WHITESPACE = _{" "}
hello = {SOI ~ "hello" ~ WHITESPACE ~ "world" ~ EOI}

main.rs

use pest::Parser;
use pest_derive::Parser;

#[derive(Parser)]
#[grammar = "grammar.pest"]
struct MyParser;

fn main() {
    let output = MyParser::parse(Rule::hello, "jello world").unwrap_err();
    println!("{}", output)
}

Instead of seeing where the parser stopped I want to see how much it expected as in show 0 to 4 as wrong.