We want to be able to iterate through digests of index
files, but without always having to distinguish between
dynamic and fixed types, so add a trait we can use as a
trait object.
Unfortunately the iterator needs to yield copies as
iterators cannot yield values with life times when
represented as trait objects (Box<dyn Iterator<Item = ?>>)
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
Single-method traits usually use the same name as their
method and aren't usually the 'noun' (which is usually an
implementation of them instead).
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
