code: def acquire_multi(self, n=1):
          '''
          Returns a list of up to `n` browsers.
  
          Raises:
              NoBrowsersAvailable if none available
          '''
          browsers = []
          with self._lock:
              if len(self._in_use) >= self.size:
                  raise NoBrowsersAvailable
              while len(self._in_use) < self.size and len(browsers) < n:
                  browser = self._fresh_browser()
                  browsers.append(browser)
                  self._in_use.add(browser)
          return browserf acquire_multi(self, n=1):
          '''
          Returns a list of up to `n` browsers.
  
          Raises:
              NoBrowsersAvailable if none available
          '''
          browsers = []
          with self._lock:
              if len(self._in_use) >= self.size:
                  raise NoBrowsersAvailable
              while len(self._in_use) < self.size and len(browsers) < n:
                  browser = self._fresh_browser()
                  browsers.append(browser)
                  self._in_use.add(browser)
          return browsers
docs: Returns a list of up to `n` browsers.
  
          Raises:
              NoBrowsersAvailable if none available