original_string: public function where($id)
      {
          $this->validateIdentifier($id);
  
          if (!is_array($id)) {
              $key = reset($this->keys);
              return [$key => $id];
          } else {
              return $id;
          }
      }
code: public function where($id)
      {
          $this->validateIdentifier($id);
  
          if (!is_array($id)) {
              $key = reset($this->keys);
              return [$key => $id];
          } else {
              return $id;
          }
      }
code_tokens: public function where ( $ id ) { $ this -> validateIdentifier ( $ id ) ; if ( ! is_array ( $ id ) ) { $ key = reset ( $ this -> keys ) ; return [ $ key => $ id ] ; } else { return $ id ; } }
docstring: Creates the where condition for the identifier
  
  @param int|string|array $id
  @return array
docstring_tokens: Creates the where condition for the identifier