code: def _get_mc_contour(self, setvalue: int) -> typing.Any:
      contour = vtk.vtkDiscreteMarchingCubes()
      contour.SetInputConnection(self.reader.GetOutputPort())
      contour.ComputeNormalsOn()
      contour.SetValue(0, setvalue)
      return contour
  
file_path: PaddleSeg/EISeg/eiseg/widget/vtk.py
imports: import typing
  import numpy
  from qtpy.QtWidgets import QWidget, QVBoxLayout
label_desc: Use image node_id 5 for calling the VTKWidget obj's underlying member method code with example usage: obj._get_mc_contour(setvalue) and returns: contour