code: def close_all():
      """Close all matplotlib figures."""
      yield
      if matplotlib is not None:
          import matplotlib.pyplot as plt
  
          plt.close("all")
  
imports: import warnings
  import nibabel
  import numpy
  import pytest
  from nibabel import Nifti1Image
  from nilearn import image
  from nilearn.datasets.tests._testing import request_mocker
  from nilearn.datasets.tests._testing import temp_nilearn_data_dir
  from nilearn.experimental.surface.tests.conftest import make_mini_img, mini_img, mini_mesh
label_desc: Use image node_id 3 for calling a global function with example usage: close_all() without return types