type Tracer = FnMut(&mut CcBoxPtr);
A Tracer is a callback function that is invoked for each CcBoxPtr owned
by an instance of something.
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, enum,
trait, typedef (or
tdef).
Search functions by type signature (e.g.
vec -> usize)