code: def update_view(self):
      # banded, nbr_steps, cmap
      self.canvas.set_data(
          self.props.nbr_steps.value(), self.props.combo.currentText()
      )
  
file_path: vispy/examples/scene/isocurve_for_trisurface_qt.py
imports: import numpy
  from vispy import scene, app
  from vispy.geometry.generation import create_sphere
  from vispy.color.colormap import get_colormaps
label_desc: Use image node_id 2 for calling the MainWindow obj's underlying member method code with example usage: obj.update_view() without return types