VCardImport::tryMapAttribute

protected function tryMapAttribute(VCard\VCardElement $element, $attrName, $fildName, array &$fields)
{
	$attr = $element->getFirstAttributeByName($attrName);
	if($attr === null)
	{
		return false;
	}

	$fields[$fildName] = $attr->getValue();
	$this->mappedFields[] = $fildName;
	return true;
}