code: def get_raw_data(system, drop_extra_chs=False):
      """Find, load and process the raw data."""
      cfg_local = get_cfg_local(system)
  
      raw_data_file = os.path.join(testing_path, cfg_local["file_name"])
      reader_function = system_to_reader_fn_dict[system]
  
      raw_data = reader_function(raw_data_file, preload=True)
      crop = min(cfg_local["crop"], np.max(raw_data.times))
      if system == "eximia":
          crop -= 0.5 * (1.0 / raw_data.info["sfreq"])
      raw_data.crop(0, crop)
      raw_data.del_proj("all")
      with raw_data.info._unlock():
          raw_data.info["comps"] = []
      raw_data.drop_channels(cfg_local["removed_chan_names"])
  
      if system in ["EGI"]:
          raw_data._data[0:-1, :] = raw_data._data[0:-1, :] * 1e6
  
      if system in ["CNT"]:
          raw_data._data = raw_data._data * 1e6
  
      if system in ignore_channels_dict:
          raw_data.drop_channels(ignore_channels_dict[system])
  
      if system in drop_extra_chans_dict and drop_extra_chs:
          raw_data.drop_channels(drop_extra_chans_dict[system])
  
      return raw_data
  
file_path: mne-python/mne/io/fieldtrip/tests/helpers.py
imports: import os
  from functools import partial
  import numpy
  import mne
  from mne.utils import object_diff
label_desc: Use image node_id 7 for calling a global function with example usage: get_raw_data(system, drop_extra_chs) and returns: raw_data