__construct() public méthode

public __construct ( Riak $riak )
$riak Basho\Riak
 public function __construct(Riak $riak)
 {
     parent::__construct($riak);
     $this->parameters['wt'] = 'json';
     $this->parameters['rows'] = 10;
     $this->parameters['start'] = 0;
 }
 public function __construct(Riak $riak)
 {
     parent::__construct($riak);
 }
 public function __construct(Riak $riak)
 {
     parent::__construct($riak);
     $this->headers['Content-Type'] = self::CONTENT_TYPE_JSON;
 }
 public function __construct(Riak $riak)
 {
     parent::__construct($riak);
     $this->headers['Accept'] = 'multipart/mixed, */*';
 }