@type t() :: %DockerEngineAPI.Model.ServiceSpec{
  EndpointSpec: DockerEngineAPI.Model.EndpointSpec.t() | nil,
  Labels: %{optional(String.t()) => String.t()} | nil,
  Mode: DockerEngineAPI.Model.ServiceSpecMode.t() | nil,
  Name: String.t() | nil,
  Networks: [DockerEngineAPI.Model.NetworkAttachmentConfig.t()] | nil,
  RollbackConfig: DockerEngineAPI.Model.ServiceSpecRollbackConfig.t() | nil,
  TaskTemplate: DockerEngineAPI.Model.TaskSpec.t() | nil,
  UpdateConfig: DockerEngineAPI.Model.ServiceSpecUpdateConfig.t() | nil
}