isAnyDefaultTaxZoneChosen() public method

 /**
  * @Given channel :channel should not have default tax zone
  */
 public function channelShouldNotHaveDefaultTaxZone(ChannelInterface $channel)
 {
     $this->updatePage->open(['id' => $channel->getId()]);
     Assert::false($this->updatePage->isAnyDefaultTaxZoneChosen(), 'Channel should not have default tax zone, but it has.');
 }