def make_region(self) -> CacheRegion:
arguments = self.get_setting("<STR_LIT>", None)<EOL>def null_cache():<EOL><INDENT>return make_region().configure(<EOL>"<STR_LIT>"<EOL>)<EOL><DEDENT>if isinstance(arguments, str) and arguments:<EOL><INDENT>try:<EOL><INDENT>arguments = json.loads(arguments)<EOL><DEDENT>except ValueError:<EOL><INDENT>if self.ignore_cache_errors:<EOL><INDENT>return null_cache()<EOL><DEDENT>raise ArcaMisconfigured("<STR_LIT>")<EOL><DEDENT><DEDENT>cache_backend = self.get_setting("<STR_LIT>", "<STR_LIT>")<EOL>if cache_backend == "<STR_LIT>":<EOL><INDENT>if isinstance(arguments, dict) and "<STR_LIT:filename>" in arguments:<EOL><INDENT>Path(arguments["<STR_LIT:filename>"]).parent.mkdir(parents=True, exist_ok=True)<EOL><DEDENT><DEDENT>try:<EOL><INDENT>region = make_region().configure(<EOL>cache_backend,<EOL>expiration_time=self.get_setting("<STR_LIT>", None),<EOL>arguments=arguments<EOL>)<EOL>region.set("<STR_LIT>", datetime.now().isoformat())<EOL><DEDENT>except ModuleNotFoundError:<EOL><INDENT>if self.ignore_cache_errors:<EOL><INDENT>return null_cache()<EOL><DEDENT>raise ModuleNotFoundError("<STR_LIT>")<EOL><DEDENT>except Exception:<EOL><INDENT>if self.ignore_cache_errors:<EOL><INDENT>return null_cache()<EOL><DEDENT>raise ArcaMisconfigured("<STR_LIT>")<EOL><DEDENT>return region<EOL>
Returns a :class:`CacheRegion <dogpile.cache.region.CacheRegion>` based on settings.

* Firstly, a backend is selected.
  The default is :class:`NullBackend <dogpile.cache.backends.null.NullBackend`.
* Secondly, arguments for the backends are generated.
  The arguments can be passed as a dict to the setting or as a json string.
  If the arguments aren't a dict or aren't convertible to a dict, :class:`ArcaMisconfigured` is raised.
* Lastly, the cache is tested if it works

All errors can be suppressed by the ``ignore_cache_errors`` setting.

:raise ModuleNotFoundError: In case dogpile has trouble importing the library needed for a backend.
:raise ArcaMisconfigured: In case the cache is misconfigured in any way or the cache doesn't work.