64     use std::borrow::{Borrow, Cow, ToOwned};
196     impl<'a> From<BString> for Cow<'a, BStr> {  implementation
198         fn from(s: BString) -> Cow<'a, BStr> {  in from()
199             Cow::Owned(s)  in from()
305     use std::borrow::Cow;
598     impl<'a> From<&'a BStr> for Cow<'a, BStr> {  implementation
600         fn from(s: &'a BStr) -> Cow<'a, BStr> {  in from()
601             Cow::Borrowed(s)  in from()
644     impl_partial_eq_cow!(&'a BStr, Cow<'a, BStr>);
646     impl_partial_eq_cow!(&'a BStr, Cow<'a, str>);
648     impl_partial_eq_cow!(&'a BStr, Cow<'a, [u8]>);
975     use std::borrow::Cow;  in test_cows_regression()
977     let c1 = Cow::from(b"hello bstr".as_bstr());  in test_cows_regression()
981     let c3 = Cow::from("hello str");  in test_cows_regression()