src/Group.php
public function open()
    {
        return $this->client->apiCall('groups.open', [
            'channel' => $this->getId(),
        ])->then(function ($response) {
            return !isset($response['no_op']);
        });
    }
public function open()
    {
        return $this->client->apiCall('groups.open', [
            'channel' => $this->getId(),
        ])->then(function ($response) {
            return !isset($response['no_op']);
        });
    }
public function open ( ) { return $ this -> client -> apiCall ( 'groups.open' , [ 'channel' => $ this -> getId ( ) , ] ) -> then ( function ( $ response ) { return ! isset ( $ response [ 'no_op' ] ) ; } ) ; }
Opens the group.

@return \React\Promise\PromiseInterface
Opens the group .