public function addScope(/*# string */ $scope)
    {
        if ($this->isShareable() === false &&
            !in_array($scope, $this->scopes)
        ) {
            $this->scopes[] = $scope;
        }
        return $this;
    }
public function addScope(/*# string */ $scope)
    {
        if ($this->isShareable() === false &&
            !in_array($scope, $this->scopes)
        ) {
            $this->scopes[] = $scope;
        }
        return $this;
    }
{@inheritDoc}