code: def _make_stim_channel(
      trigger_chs, slope, threshold, stim_code, trigger_values
  ):
      """Create synthetic stim channel from multiple trigger channels."""
      if slope == "+":
          trig_chs_bin = trigger_chs > threshold
      elif slope == "-":
          trig_chs_bin = trigger_chs < threshold
      else:
          raise ValueError("slope needs to be '+' or '-'")
      # trigger value
      if stim_code == "binary":
          trigger_values = 2 ** np.arange(len(trigger_chs))
      elif stim_code != "channel":
          raise ValueError(
              "stim_code must be 'binary' or 'channel', got %s"
              % repr(stim_code)
          )
      trig_chs = trig_chs_bin * trigger_values[:, np.newaxis]
      return np.array(trig_chs.sum(axis=0), ndmin=2)
  
imports: from collections import OrderedDict, defaultdict
  from math import cos, sin
  from os import SEEK_CUR, PathLike
  from os import path
  from pathlib import Path
  import numpy
  from ..._fiff.constants import FIFF
  from ..._fiff.meas_info import _empty_info
  from ..._fiff.pick import pick_types
  from ..._fiff.utils import _mult_cal_one
  from ...epochs import BaseEpochs
  from ...event import read_events
  from ...transforms import als_ras_trans, apply_trans
  from ...utils import _check_fname, _check_option, _stamp_to_dt, fill_doc, logger, verbose, warn
  from ..base import BaseRaw
  from .constants import KIT, LEGACY_AMP_PARAMS
  from .coreg import _set_dig_kit, read_mrk
label_desc: Use image node_id 4 for calling a global function with example usage: _make_stim_channel(trigger_chs, slope, threshold, stim_code, trigger_values) and returns: np