code: def test_sss_rank():
      """Test passing rank explicitly during inverse computation."""
      # make raw match the fwd and cov, doesn't matter that they are mismatched
      raw = mne.io.read_raw_fif(fname_sss).pick("meg")
      raw.rename_channels(
          {
              ch_name: f"{ch_name[:3]} {ch_name[3:]}"
              for ch_name in raw.ch_names
          }
      )
      fwd = mne.read_forward_solution(fname_fwd)
      cov = mne.read_cov(fname_cov)
      with pytest.warns(
          RuntimeWarning, match="rank as it exceeds.*302 > 67"
      ):
          inv = make_inverse_operator(raw.info, fwd, cov)
      rank = (inv["noise_cov"]["eig"] > 0).sum()
      assert rank == 302
      # should not warn
      inv = make_inverse_operator(raw.info, fwd, cov, rank=dict(meg=67))
      rank = (inv["noise_cov"]["eig"] > 0).sum()
      assert rank == 67
  
imports: import copy
  import re
  from pathlib import Path
  import numpy
  import pytest
  from numpy.testing import assert_allclose, assert_array_almost_equal, assert_array_equal, assert_array_less, assert_equal
  from scipy import sparse
  import mne
  from mne import Covariance, EvokedArray, SourceEstimate, combine_evoked, compute_raw_covariance, convert_forward_solution, make_ad_hoc_cov, make_forward_solution, make_sphere_model, pick_channels_forward, pick_types, pick_types_forward, read_cov, read_evokeds, read_forward_solution
  from mne.datasets import testing
  from mne.epochs import Epochs, EpochsArray, make_fixed_length_epochs
  from mne.event import read_events
  from mne.forward import apply_forward, is_fixed_orient, restrict_forward_to_stc
  from mne.io import read_info, read_raw_fif
  from mne.label import label_sign_flip, read_label
  from mne.minimum_norm import INVERSE_METHODS, apply_inverse, apply_inverse_cov, apply_inverse_epochs, apply_inverse_raw, apply_inverse_tfr_epochs, compute_rank_inverse, make_inverse_operator, prepare_inverse_operator, read_inverse_operator, write_inverse_operator
  from mne.source_estimate import VolSourceEstimate, read_source_estimate
  from mne.source_space._source_space import _get_src_nn
  from mne.surface import _normal_orth
  from mne.time_frequency import EpochsTFR
  from mne.utils import _record_warnings, catch_logging
label_desc: Use image node_id 36 for calling a global function with example usage: test_sss_rank() without return types