Receive proxies from the provider and return them.

        :return: :attr:`.proxies`

async def get_proxies(self):
        """Receive proxies from the provider and return them.

        :return: :attr:`.proxies`
        """
        log.debug('Try to get proxies from %s' % self.domain)

        async with aiohttp.ClientSession(
            headers=get_headers(), cookies=self._cookies, loop=self._loop
        ) as self._session:
            await self._pipe()

        log.debug(
            '%d proxies received from %s: %s'
            % (len(self.proxies), self.domain, self.proxies)
        )
        return self.proxies