func Get(ctx context.Context, name string, options map[string]interface{}, repository distribution.Repository) (distribution.Repository, error)
Get constructs a RepositoryMiddleware with the given options using the named backend.
func Register(name string, initFunc InitFunc) error
Register is used to register an InitFunc for a RepositoryMiddleware backend with the given name.
InitFunc is the type of a RepositoryMiddleware factory function and is used to register the constructor for different RepositoryMiddleware backends.
type InitFunc func(ctx context.Context, repository distribution.Repository, options map[string]interface{}) (distribution.Repository, error)