silverstripe-framework/Forms/Form_FieldMap.php

<?php

namespace SilverStripe\Forms;

use SilverStripe\View\ViewableData;

class Form_FieldMap extends ViewableData
{

	/**
	 * @var Form
	 */
	protected $form;

	public function __construct($form)
	{
		$this->form = $form;
		parent::__construct();
	}

	/**
	 * Ensure that all potential method calls get passed to __call(), therefore to dataFieldByName
	 * @param string $method
	 * @return bool
	 */
	public function hasMethod($method)
	{
		return true;
	}

	public function __call($method, $args = null)
	{
		return $this->form->Fields()->fieldByName($method);
	}
}