code: def _write_source_to(self, file):
      self._vengine._f = file
      try:
          self._vengine.write_source_to_f()
      finally:
          del self._vengine._f
  
imports: import sys, os, binascii, shutil, io
  from .None import __version_verifier_modules__
  from .None import ffiplatform
  from .error import VerificationError
label_desc: Use image node_id 10 for calling the Verifier obj's underlying member method code with example usage: obj._write_source_to(file) without return types