docs: def load_config(cls, configfile="logging.yaml"):
          """
          :raises: ValueError
          """
          configfile = getenv(cls.CONFIGFILE_ENV_KEY, configfile)
          if isfile(configfile):
              with open(configfile, "r") as cf:
                  # noinspection PyBroadException
                  try:
                      dictConfig(load(cf))
                  except ValueError:
                      debug("Learn to config foooo! Improper config at %s", configfile)
                  except Exception:
                      exception("Something went wrong while reading %s.", configfile)
          else:
              raise ValueError("Invalid configfile specified: {}".format(configfile))