code: def find_chan_in_region(channels, anat, region_name):
      
      if 'region' not in channels.chan[0].attr.keys():
          lg.info('Computing region for each channel.')
          channels = assign_region_to_channels(channels, anat)
  
      chan_in_region = []
      for one_chan in channels.chan:
          if region_name in one_chan.attr['region']:
              chan_in_region.append(one_chan.label)
  
      return chan_in_region
docs: Find which channels are in a specific region.
  
      Parameters
      ----------
      channels : instance of wonambi.attr.chan.Channels
          channels, that have locations
      anat : instance of wonambi.attr.anat.Freesurfer
          anatomical information taken from freesurfer.
      region_name : str
          the name of the region, according to FreeSurferColorLUT.txt
  
      Returns
      -------
      chan_in_region : list of str
          list of the channels that are in one region.