@type t() :: %SBoM.CycloneDX.V16.Annotation{
  __unknown_fields__: [Protobuf.unknown_field()],
  annotator: SBoM.CycloneDX.V16.AnnotatorChoice.t() | nil,
  bom_ref: String.t() | nil,
  subjects: [String.t()],
  text: String.t(),
  timestamp: Google.Protobuf.Timestamp.t() | nil
}