code: def _mock_tokenize(text, max_len):
      del text
      return np.zeros((max_len,), dtype=np.int32)
  
file_path: scenic/scenic/projects/owl_vit/notebooks/tests/interactive_test.py
imports: from unittest import mock
  from absl.testing import absltest
  from bokeh.models import callbacks
  import numpy
  from scenic.projects.owl_vit.notebooks import interactive
label_desc: Use image node_id 1 for calling a global function with example usage: _mock_tokenize(text, max_len) and returns: np