t() :: %Cloudevents.Format.V_1_0.Event{
  data: any() | nil,
  datacontenttype: String.t() | nil,
  dataschema: String.t() | nil,
  extensions: %{optional(String.t()) => any()} | nil,
  id: String.t(),
  source: String.t(),
  specversion: String.t(),
  subject: String.t() | nil,
  time: String.t() | nil,
  type: String.t()
}