class_docstr: Class to test cell picking.
class_docstr_tok: ["Class","to","test","cell","picking","."]
docstr: Return the picked position.
docstr_tok: ["Return","the","picked","position","."]
code: def GetPickPosition(self):
      """Return the picked position."""
      vtk_cell = self.mesh.GetCell(self.cell_id)
      cell = [
          vtk_cell.GetPointId(point_id)
          for point_id in range(vtk_cell.GetNumberOfPoints())
      ]
      self.point_id = cell[0]
      return self.mesh.points[self.point_id]
  
imports: import os
  from contextlib import nullcontext
  from pathlib import Path
  import numpy
  import pytest
  from numpy.testing import assert_allclose
  import mne
  from mne._fiff.constants import FIFF
  from mne.channels import DigMontage
  from mne.coreg import Coregistration
  from mne.datasets import testing
  from mne.io import read_info
  from mne.io.kit.tests import data_dir
  from mne.utils import catch_logging, get_config
  from mne.viz import _3d
label_desc: Use image node_id 4 for calling the TstVTKPicker obj's underlying member method code with example usage: obj.GetPickPosition() and returns: self