code: def test_load_channels():
      """Loads geostat training image"""
      mesh = examples.load_channels()
      assert mesh.n_points
  
file_path: pyvista/tests/examples/test_examples.py
imports: import numpy
  import pytest
  import pyvista
  from pyvista import examples
label_desc: Use image node_id 5 for calling a global function with example usage: test_load_channels() without return types