@type t() :: %Docket.Graph.Edge{
  description: String.t() | nil,
  from: String.t() | [String.t()] | nil,
  guard: Docket.Guard.t() | nil,
  id: String.t() | nil,
  label: String.t() | nil,
  metadata: map(),
  source_handle: String.t() | nil,
  target_handle: String.t() | nil,
  to: String.t() | nil
}