public function findField($field)
	{
		$fields = $this->getEditFields();

		//return either the Field object or throw an InvalidArgumentException
		if (!isset($fields[$field]))
		{
			throw new \InvalidArgumentException("The " . $field . " field does not exist on the " . $this->config->getOption('name') . " model");
		}

		return $fields[$field];
	}