code: def test_dim_cmap():
      # This is only a smoke test
      dim_cmap(plt.cm.jet)
  
file_path: nilearn/nilearn/plotting/tests/test_cm.py
imports: import matplotlib.pyplot
  import numpy
  import pytest
  from nilearn.plotting.cm import dim_cmap, mix_colormaps, replace_inside
label_desc: Use image node_id 1 for calling a global function with example usage: test_dim_cmap() without return types