@type t() :: %SBoM.CycloneDX.V17.Metadata{
  __unknown_fields__: [Protobuf.unknown_field()],
  authors: [SBoM.CycloneDX.V17.OrganizationalContact.t()],
  component: SBoM.CycloneDX.V17.Component.t() | nil,
  distributionConstraints:
    SBoM.CycloneDX.V17.Metadata.DistributionConstraints.t() | nil,
  licenses: [SBoM.CycloneDX.V17.LicenseChoice.t()],
  lifecycles: [SBoM.CycloneDX.V17.Lifecycles.t()],
  manufacture: SBoM.CycloneDX.V17.OrganizationalEntity.t() | nil,
  manufacturer: SBoM.CycloneDX.V17.OrganizationalEntity.t() | nil,
  properties: [SBoM.CycloneDX.V17.Property.t()],
  supplier: SBoM.CycloneDX.V17.OrganizationalEntity.t() | nil,
  timestamp: Google.Protobuf.Timestamp.t() | nil,
  tools: SBoM.CycloneDX.V17.Tool.t() | nil
}