code: protected function getColumnReference($column, $tableless)
      {
          if ($tableless) {
              return $column;
          }
  
          // check if table is already defined
          if (count(explode(".", $column)) > 1) {
              return $column;
          }
  
          return "`" . $this->table . "`.`" . $column . "`";
      }
docs: Get column reference