class_docstr: Class to link multiple Brain objects.
code: def link_cameras(self):
      from ..backends._pyvista import _add_camera_callback
  
      def _update_camera(vtk_picker, event):
          for brain in self.brains:
              brain.plotter.update()
  
      camera = self.leader.plotter.camera
      _add_camera_callback(camera, _update_camera)
      for brain in self.brains:
          for renderer in brain.plotter.renderers:
              renderer.camera = camera
  
file_path: mne-python/mne/viz/_brain/_linkviewer.py
imports: import numpy
  from ...utils import warn
  from ..ui_events import link
label_desc: Use image node_id 8 for calling the _LinkViewer obj's underlying member method code with example usage: obj.link_cameras() without return types