docs: def renders_impl(self, template_content, context, **kwargs):
          """
          Render given template string and return the result.
  
          :param template_content: Template content
          :param context: A dict or dict-like object to instantiate given
              template file
          :param kwargs: Keyword arguments such as:
              - at_paths: Template search paths but it is not actually processed
                in this module (TODO)
              - at_encoding: Template encoding but it is not actually prcoessed
                in this module (TODO)
              - Other keyword arguments passed to the template engine to render
                templates with specific features enabled.
  
          :return: Rendered string
          """
          if "file" in kwargs:
              kwargs["file"] = None
  
          kwargs["source"] = template_content
  
          return self.__render(context, **kwargs)