referrer

type ReferrerList struct {
	Ref         ref.Ref            `json:"ref"`                   // reference queried
	Descriptors []types.Descriptor `json:"descriptors"`           // descriptors found in Index
	Annotations map[string]string  `json:"annotations,omitempty"` // annotations extracted from Index
	Manifest    manifest.Manifest  `json:"-"`                     // returned OCI Index
	Tags        []string           `json:"-"`                     // tags matched when fetching referrers
}