code: def run():
      """Run command."""
      from mne.commands.utils import _add_verbose_flag, get_optparser
  
      parser = get_optparser(__file__)
  
      parser.add_option(
          "--bem",
          dest="bem_fname",
          help="The name of the file containing the "
          "triangulations of the BEM surfaces and the "
          "conductivities of the compartments. The standard "
          "ending for this file is -bem.fif.",
          metavar="FILE",
      )
      parser.add_option(
          "--sol",
          dest="bem_sol_fname",
          help="The name of the resulting file containing BEM "
          "solution (geometry matrix). It uses the linear "
          "collocation approach. The file should end with "
          "-bem-sof.fif.",
          metavar="FILE",
          default=None,
      )
      _add_verbose_flag(parser)
  
      options, args = parser.parse_args()
      bem_fname = options.bem_fname
      bem_sol_fname = options.bem_sol_fname
      verbose = True if options.verbose is not None else False
  
      if bem_fname is None:
          parser.print_help()
          sys.exit(1)
  
      if bem_sol_fname is None:
          base, _ = os.path.splitext(bem_fname)
          bem_sol_fname = base + "-sol.fif"
  
      bem_model = mne.read_bem_surfaces(
          bem_fname, patch_stats=False, verbose=verbose
      )
      bem_solution = mne.make_bem_solution(bem_model, verbose=verbose)
      mne.write_bem_solution(bem_sol_fname, bem_solution)
  
imports: import os
  import sys
  import mne
label_desc: Use image node_id 1 for calling a global function with example usage: run() without return types