code: def short_channels(info, threshold=0.01):
      r"""Determine which NIRS channels are short.
  
      Channels with a source to detector distance of less than
      ``threshold`` are reported as short. The default threshold is 0.01 m.
  
      Parameters
      ----------
      %(info_not_none)s
      threshold : float
          The threshold distance for what is considered short in meters.
  
      Returns
      -------
      short : array of bool
          Array indicating which channels are short.
          Of shape equal to number of channels.
      """
      return source_detector_distances(info) < threshold
  
file_path: mne-python/mne/preprocessing/nirs/nirs.py
imports: import re
  import numpy
  from ..._fiff.pick import _picks_to_idx, pick_types
  from ...utils import _check_option, _validate_type, fill_doc
label_desc: Use image node_id 2 for calling a global function with example usage: short_channels(info, threshold) and returns: unknown