docs: def getCurrent(cls):
          """
          :rtype: YowsupEnv
          """
          if cls.__CURR is None:
              env = DEFAULT
              envs = cls.getRegisteredEnvs()
              if env not in envs:
                  env = envs[0]
              logger.debug("Env not set, setting it to %s" % env)
              cls.setEnv(env)
          return cls.__CURR