pub fn map_from<F, T: From<F>>(e: Traced<F>) -> Traced<T>
Maps value of error wrapped in Traced
with its From
implementation.
This is an equivalent of
impl<E1, E2: From<E1>> From<Traced<E1>> for Traced<E2>
(which cannot be implemented at the moment due to the lack of specialization
in Rust).