code: def _write_model(self, specification, specification_set):
          
          filename = "vspk/%s%s.cs" % (self._class_prefix, specification.entity_name)
  
          override_content = self._extract_override_content(specification.entity_name)
          superclass_name = "RestObject"
  
          defaults = {}
          section = specification.entity_name
          if self.attrs_defaults.has_section(section):
              for attribute in self.attrs_defaults.options(section):
                  defaults[attribute] = self.attrs_defaults.get(section, attribute)
  
          self.write(destination=self.output_directory,
                     filename=filename,
                     template_name="model.cs.tpl",
                     specification=specification,
                     specification_set=specification_set,
                     version=self.api_version,
                     name=self._name,
                     class_prefix=self._class_prefix,
                     product_accronym=self._product_accronym,
                     override_content=override_content,
                     superclass_name=superclass_name,
                     header=self.header_content,
                     version_string=self._api_version_string,
                     package_name=self._package_name,
                     attribute_defaults=defaults)
  
          return (filename, specification.entity_name)
docs: Write autogenerate specification file