use ::hashseq::HashSeq;
fn main() {
let mut seq = HashSeq::default();
seq.insert(0, 'a');
seq.insert(1, 'b');
seq.insert(2, 'c');
let result: String = seq.iter().collect();
assert_eq!(result, "abc");
println!("result of inserting 'a', 'b', 'c': {}", result);
}