code: def demo_ortho_slicer():
      """A small demo of the OrthoSlicer functionality."""
      plt.clf()
      oslicer = OrthoSlicer(cut_coords=(0, 0, 0))
      from .anat_cache import _AnatCache
  
      map, affine, _ = _AnatCache.get_anat()
      oslicer.plot_map(map, affine, cmap=plt.cm.gray)
      return oslicer
  
imports: import matplotlib
  import matplotlib.pyplot
  import numpy
  from matplotlib import transforms
  from nipy.utils import is_iterable
  from ..datasets import VolumeImg
  from .None import cm
  from .coord_tools import coord_transform, find_cut_coords, get_bounds, get_mask_bounds
  from .edge_detect import _edge_map
label_desc: Use image node_id 2 for calling a global function with example usage: demo_ortho_slicer() and returns: oslicer