Method prepare

packages/eval/src/runner.ts:58–58

(input: {
    readonly spec: ExperimentSpec;
    readonly cells: readonly ExperimentCell[];
  })

  readonly kind: ExperimentCell['subject']['kind'];
  validate?(cell: ExperimentCell): void;
  prepare?(input: {
    readonly spec: ExperimentSpec;
    readonly cells: readonly ExperimentCell[];
  }): Promise<void>;