@type t() :: %SBoM.CycloneDX.V16.Metadata{
  __unknown_fields__: [Protobuf.unknown_field()],
  authors: [SBoM.CycloneDX.V16.OrganizationalContact.t()],
  component: SBoM.CycloneDX.V16.Component.t() | nil,
  licenses: [SBoM.CycloneDX.V16.LicenseChoice.t()],
  lifecycles: [SBoM.CycloneDX.V16.Lifecycles.t()],
  manufacture: SBoM.CycloneDX.V16.OrganizationalEntity.t() | nil,
  manufacturer: SBoM.CycloneDX.V16.OrganizationalEntity.t() | nil,
  properties: [SBoM.CycloneDX.V16.Property.t()],
  supplier: SBoM.CycloneDX.V16.OrganizationalEntity.t() | nil,
  timestamp: Google.Protobuf.Timestamp.t() | nil,
  tools: SBoM.CycloneDX.V16.Tool.t() | nil
}