pub trait AsOption<T> {
fn as_option<'a>(&'a self) -> Option<&'a T>;
}A generic trait for converting a value to a Option
fn as_option<'a>(&'a self) -> Option<&'a T>Convert to the option type
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).