# Functions
NewDigestRequester returns a digest requester based on the library "crane".
NewImageDigestUpdater returns an IImageDigestUpdater after validating its fields.
# Interfaces
IDigestRequester provides an interface for DigestRequesters, which are responsible for querying the proper registry for a digest given an image's name and tag.
IImageDigestUpdater provides an interface for ImageDigestUpdaters, which update images with their digests.