public function getRoot(): self
    {
        return new self($this->uri->withPath('/'), $this->apiClient, $this->validator);
    }
public function getRoot(): self
    {
        return new self($this->uri->withPath('/'), $this->apiClient, $this->validator);
    }
public function getRoot ( ) : self { return new self ( $ this -> uri -> withPath ( '/' ) , $ this -> apiClient , $ this -> validator ) ; }
The root location of a Reference.

@see https://firebase.google.com/docs/reference/js/firebase.database.Reference#root

@return Reference
The root location of a Reference .