code: def img():
      return 255 * np.ones((4, 4, 3), dtype=np.uint8)
  
file_path: icevision/tests/models/mmdet/test_dataloaders.py
imports: import pytest
  from icevision.all import *
label_desc: Use image node_id 1 for calling a global function with example usage: img() and returns: unknown