code: public function watch($doWatch = true, $user = null)
      {
          $familiarity = $this->getFamiliarity($user);
          if (!$familiarity) {
              return false;
          }
          if ($doWatch) {
              $familiarity->watching = 1;
          } else {
              $familiarity->watching = 0;
          }
  
          return $familiarity->save();
      }
docs: [[@doctodo method_description:watch]].
  
  @param boolean                      $doWatch [[@doctodo param_description:doWatch]] [optional]
  @param [[@doctodo param_type:user]] $user    [[@doctodo param_description:user]] [optional]
  
  @return [[@doctodo return_type:watch]] [[@doctodo return_description:watch]]