code: public function setFields($fields = [])
      {
          $this->fields = $fields;
          $this->nbFields = count($this->fields);
          
          /*
           * make array with backquote from create columns
           */
          $this->dbColumns = array_map(function($val){
              return "`$val`";
          }, $fields);
          
          return $this;
      }
docs: Désignation des noms de colonnes
  
  @param array $fields [colname=>'', type=>'LONGTEXT')
  
  @return $this