code: def tractogram_has_seeds(tractogram_path):
      tractogram = nib.streamlines.load(tractogram_path).tractogram
  
      return len(tractogram.data_per_streamline["seeds"]) > 0
  
file_path: dipy/dipy/workflows/tests/test_tracking.py
imports: from os.path import join
  from tempfile import TemporaryDirectory
  import warnings
  import nibabel
  import numpy
  from numpy.testing import assert_equal
  from dipy.testing import assert_false, assert_true
  from dipy.data import get_fnames
  from dipy.io.image import save_nifti, load_nifti
  from dipy.io.streamline import load_tractogram
  from dipy.reconst.shm import descoteaux07_legacy_msg
  from dipy.workflows.mask import MaskFlow
  from dipy.workflows.reconst import ReconstCSDFlow
  from dipy.workflows.tracking import LocalFiberTrackingPAMFlow, PFTrackingPAMFlow
label_desc: Use image node_id 4 for calling a global function with example usage: tractogram_has_seeds(tractogram_path) and returns: unknown