type CharRSplitIterator<'self, Sep> = Invert<CharSplitIterator<'self, Sep>>;
An iterator over the substrings of a string, separated by sep,
starting from the back of the string.
Prefix searches with a type followed by a colon (e.g.
fn:) to restrict the search to a given type.
Accepted types are: fn, mod,
struct (or str), enum,
trait, typedef (or
tdef).