code: func (client *Client) Snapshot(query string, start, end time.Time, eventQuery string) (string, error) {
  	options := map[string]string{"metric_query": query, "event_query": eventQuery}
  
  	return client.SnapshotGeneric(options, start, end)
  }
docs: // Snapshot creates an image from a graph and returns the URL of the image.