code: def test_mosaic_slicer_img_none_false(cut_coords, img):
      """Tests for MosaicSlicer when img is ``None`` or ``False``
      while initializing the figure.
      """
      slicer = MosaicSlicer.init_with_figure(
          img=None, cut_coords=cut_coords
      )
      slicer.add_overlay(img, cmap=plt.cm.gray, colorbar=True)
      slicer.close()
  
imports: import matplotlib
  import matplotlib.pyplot
  import numpy
  import pytest
  from nibabel import Nifti1Image
  from nilearn.datasets import load_mni152_template
  from nilearn.plotting.displays import BaseAxes, LProjector, LRProjector, LYRProjector, LYRZProjector, LZRProjector, LZRYProjector, MosaicSlicer, OrthoProjector, OrthoSlicer, RProjector, TiledSlicer, XProjector, XSlicer, XZProjector, XZSlicer, YProjector, YSlicer, YXProjector, YXSlicer, YZProjector, YZSlicer, ZProjector, ZSlicer
label_desc: Use image node_id 12 for calling a global function with example usage: test_mosaic_slicer_img_none_false(cut_coords, img) without return types