original_string: private function get_access_token() {
          global $SESSION;
          if (isset($SESSION->{self::SESSIONKEY}) && $SESSION->{self::SESSIONKEY}) {
              $this->client->setAccessToken($SESSION->{self::SESSIONKEY});
              return $SESSION->{self::SESSIONKEY};
          }
          return null;
      }
code: private function get_access_token() {
          global $SESSION;
          if (isset($SESSION->{self::SESSIONKEY}) && $SESSION->{self::SESSIONKEY}) {
              $this->client->setAccessToken($SESSION->{self::SESSIONKEY});
              return $SESSION->{self::SESSIONKEY};
          }
          return null;
      }
code_tokens: private function get_access_token ( ) { global $ SESSION ; if ( isset ( $ SESSION -> { self :: SESSIONKEY } ) && $ SESSION -> { self :: SESSIONKEY } ) { $ this -> client -> setAccessToken ( $ SESSION -> { self :: SESSIONKEY } ) ; return $ SESSION -> { self :: SESSIONKEY } ; } return null ; }
docstring: Gets the access token from session and sets it to client.
  
  @return null|string null or token.
docstring_tokens: Gets the access token from session and sets it to client .