pub trait CowStrUtils<'a> {
// Required methods
fn split_at(&self, mid: usize) -> (Cow<'a, str>, Cow<'a, str>);
fn to_os_str(self) -> Cow<'a, OsStr>;
}pub trait CowStrUtils<'a> {
// Required methods
fn split_at(&self, mid: usize) -> (Cow<'a, str>, Cow<'a, str>);
fn to_os_str(self) -> Cow<'a, OsStr>;
}