code: def _this_interpol(inst, ref_meg=False):
      from mne.channels.interpolation import _interpolate_bads_meg
  
      _interpolate_bads_meg(inst, ref_meg=ref_meg, mode="fast")
      return inst
  
imports: from itertools import compress
  from pathlib import Path
  import numpy
  import pytest
  from numpy.testing import assert_allclose, assert_array_equal
  from mne import Epochs, pick_channels, pick_types, read_events
  from mne._fiff.constants import FIFF
  from mne._fiff.proj import _has_eeg_average_ref_proj
  from mne.channels import make_dig_montage
  from mne.channels.interpolation import _make_interpolation_matrix
  from mne.datasets import testing
  from mne.io import RawArray, read_raw_ctf, read_raw_fif, read_raw_nirx
  from mne.preprocessing.nirs import beer_lambert_law, optical_density, scalp_coupling_index
  from mne.utils import _record_warnings
label_desc: Use image node_id 4 for calling a global function with example usage: _this_interpol(inst, ref_meg) and returns: inst