code: def export_artifacts(self, processed_artifacts, sketch_id):
      
  
      # Export processed timeline(s)
      for timeline_name, artifact_path in processed_artifacts:
        print('Uploading {0:s} to timeline {1:s}'.format(
            artifact_path, timeline_name))
        new_timeline_id = self.upload_timeline(timeline_name, artifact_path)
        self.add_timeline_to_sketch(sketch_id, new_timeline_id)
  
      return sketch_id
docs: Upload provided artifacts to specified, or new if non-existent, sketch.
  
      Args:
        processed_artifacts:  List of (timeline_name, artifact_path) tuples
        sketch_id: ID of sketch to append the timeline to
  
      Returns:
        int: ID of sketch.