code: def _append_test_params(
      params_list: list, image_data, expected_spec: dict
  ):
      params_list.append(([image_data], {}, expected_spec))
  
imports: import numpy
  import pytest
  from lets_plot.plot.geom_imshow_ import geom_imshow
  from test_geom_imshow_util import _image_spec, _image_bbox
label_desc: Use image node_id 1 for calling a global function with example usage: _append_test_params(params_list, image_data, expected_spec) without return types