code: def render_template(self):
      if opt.has_mako and self.template:
          from mako.template import Template
  
          template = Template(filename=self.template)
          report = template.render(
              run=self.run_entry,
              config=self.config,
              info=self.info,
              cout=self.cout,
              savedir=self.dir,
          )
          ext = self.template.suffix
          with open(os.path.join(self.dir, "report" + ext), "w") as f:
              f.write(report)
  
imports: import json
  import os
  import os.path
  from pathlib import Path
  from typing import Optional
  import warnings
  from shutil import copyfile, SameFileError
  from sacred.commandline_options import cli_option
  from sacred.dependencies import get_digest
  from sacred.observers.base import RunObserver
  from sacred import optional
  from sacred.serializer import flatten
  from sacred.utils import PathType
label_desc: Use image node_id 15 for calling the FileStorageObserver obj's underlying member method code with example usage: obj.render_template() without return types