code: def _export_raw(fname, raw, overwrite):
      """Export Raw object to BrainVision via pybv."""
      fname = str(fname)
      ext = os.path.splitext(fname)[-1]
      if ext != ".vhdr":
          fname = fname.replace(ext, ".vhdr")
      _export_mne_raw(raw=raw, fname=fname, overwrite=overwrite)
  
imports: import os
  from ..utils import _check_pybv_installed
  from pybv._export import _export_mne_raw
label_desc: Use image node_id 1 for calling a global function with example usage: _export_raw(fname, raw, overwrite) without return types