pub trait TrimInPlace {
// Required methods
fn trim_in_place(&mut self) -> &str;
fn trim_start_in_place(&mut self) -> &str;
fn trim_end_in_place(&mut self) -> &str;
fn trim_matches_in_place(&mut self, pat: char) -> &str;
fn trim_start_matches_in_place(&mut self, pat: char) -> &str;
fn trim_end_matches_in_place(&mut self, pat: char) -> &str;
}