@type t() :: %DockerEngineAPI.Model.TaskSpecPlacement{
  Constraints: [String.t()] | nil,
  MaxReplicas: integer() | nil,
  Platforms: [DockerEngineAPI.Model.Platform.t()] | nil,
  Preferences:
    [DockerEngineAPI.Model.TaskSpecPlacementPreferencesInner.t()] | nil
}