How to use the pydocstyle.utils function in pydocstyle

def runtest(self):
        pydocstyle.utils.log.setLevel(logging.WARN)  # TODO: follow that of pytest

        # https://github.com/PyCQA/pydocstyle/blob/4.0.1/src/pydocstyle/cli.py#L42-L45
        for filename, checked_codes, ignore_decorators in self.parser.get_files_to_check():
            errors = [str(error) for error in pydocstyle.check((str(self.fspath),), select=checked_codes,
                                                               ignore_decorators=ignore_decorators)]
        if errors:
            raise PyDocStyleError('\n'.join(errors))
        elif hasattr(self.config, 'cache'):
            # update cache
            # http://pythonhosted.org/pytest-cache/api.html
            cache = self.config.cache.get(self.CACHE_KEY, {})
            cache[str(self.fspath)] = self.fspath.mtime()
            self.config.cache.set(self.CACHE_KEY, cache)

# Copyright 2017 Palantir Technologies, Inc.
import contextlib
import logging
import os
import re
import sys

import pydocstyle
from pyls import hookimpl, lsp

log = logging.getLogger(__name__)

# PyDocstyle is a little verbose in debug message
pydocstyle_logger = logging.getLogger(pydocstyle.utils.__name__)
pydocstyle_logger.setLevel(logging.INFO)

DEFAULT_MATCH_RE = pydocstyle.config.ConfigurationParser.DEFAULT_MATCH_RE
DEFAULT_MATCH_DIR_RE = pydocstyle.config.ConfigurationParser.DEFAULT_MATCH_DIR_RE


@hookimpl
def pyls_settings():
    # Default pydocstyle to disabled
    return {"plugins": {"pydocstyle": {"enabled": False}}}


@hookimpl
def pyls_lint(config, document):
    settings = config.plugin_settings("pydocstyle")
    log.debug("Got pydocstyle settings: %s", settings)

# Copyright 2017 Palantir Technologies, Inc.
import contextlib
import logging
import os
import re
import sys

import pydocstyle
from pyls import hookimpl, lsp

log = logging.getLogger(__name__)

# PyDocstyle is a little verbose in debug message
pydocstyle_logger = logging.getLogger(pydocstyle.utils.__name__)
pydocstyle_logger.setLevel(logging.INFO)

DEFAULT_MATCH_RE = pydocstyle.config.ConfigurationParser.DEFAULT_MATCH_RE
DEFAULT_MATCH_DIR_RE = pydocstyle.config.ConfigurationParser.DEFAULT_MATCH_DIR_RE


@hookimpl
def pyls_settings():
    # Default pydocstyle to disabled
    return {'plugins': {'pydocstyle': {'enabled': False}}}


@hookimpl
def pyls_lint(config, document):
    settings = config.plugin_settings('pydocstyle')
    log.debug("Got pydocstyle settings: %s", settings)