code: def time_bounding_box_sparse(self):
      bounding_box(self.sparse_vol)
  
file_path: dipy/benchmarks/benchmarks/bench_segment.py
imports: import numpy
  from dipy.data import get_fnames
  from dipy.io.streamline import load_tractogram
  from dipy.tracking.streamline import Streamlines, set_number_of_points
  from dipy.segment.metricspeed import Metric
  from dipy.segment.clustering import QuickBundles
  from dipy.segment.mask import bounding_box
label_desc: Use image node_id 2 for calling the BenchMask obj's underlying member method code with example usage: obj.time_bounding_box_sparse() without return types