def StartFile(self, name):
    self.EndFile()
    self._current_file_data = StringIO.StringIO()
    name = '%s%s' % (self._file_path_prefix, name)
    # Let this explode if the name is not ascii.
    self._current_file_name = name.encode('ascii')
    return self._current_file_data
foolscap's method, will be called directly by StreamNode (which will push data to Node)
dataset/ETHPy150Open google/apis-client-generator/src/googleapis/codegen/filesys/tar_library_package.py/TarLibraryPackage.StartFile--crossover with--dataset/ETHPy150Open selfsk/nodeset.core/src/nodeset/core/node.py/_Node.remote_stream