code: func (c *LayerTree) ReplaySnapshot(snapshotId string, fromStep int, toStep int, scale float64) (string, error) {
  	var v LayerTreeReplaySnapshotParams
  	v.SnapshotId = snapshotId
  	v.FromStep = fromStep
  	v.ToStep = toStep
  	v.Scale = scale
  	return c.ReplaySnapshotWithParams(&v)
  }
docs: // ReplaySnapshot - Replays the layer snapshot and returns the resulting bitmap.
  // snapshotId - The id of the layer snapshot.
  // fromStep - The first step to replay from (replay from the very start if not specified).
  // toStep - The last step to replay to (replay till the end if not specified).
  // scale - The scale to apply while replaying (defaults to 1).
  // Returns -  dataURL - A data: URL for resulting image.