system/classes/Model.php
protected function _fetchData($name)
    {
      $gateway = new \Cora\Gateway($this->getDbAdaptor(), $this->getTableName(), $this->getPrimaryKey());
      return $gateway->fetchData($this->getFieldName($name), $this);
    }
protected function _fetchData($name)
    {
      $gateway = new \Cora\Gateway($this->getDbAdaptor(), $this->getTableName(), $this->getPrimaryKey());
      return $gateway->fetchData($this->getFieldName($name), $this);
    }
Retrieves a single piece of data for the current model that is stored on this model's primary table.

@return string