code: def short_raw():
      """Create a short, picked raw instance."""
      raw = (
          read_raw_fif(raw_fname).crop(0, 7).pick(["meg", "eeg", "eog"])
      )
      raw.pick(raw.ch_names[:306:10] + raw.ch_names[306:]).load_data()
      raw.info.normalize_proj()
      return raw
  
file_path: mne-python/mne/preprocessing/tests/test_ssp.py
imports: from pathlib import Path
  import numpy
  import pytest
  from numpy.testing import assert_array_almost_equal
  from mne import pick_types
  from mne._fiff.proj import activate_proj, make_projector
  from mne.datasets import testing
  from mne.io import read_raw_ctf, read_raw_fif
  from mne.preprocessing.ssp import compute_proj_ecg, compute_proj_eog
label_desc: Use image node_id 1 for calling a global function with example usage: short_raw() and returns: raw