public function getRange_($start, $end) {
		$ret = new PrettyArray();
		$collecting = false;
		$start = (string)$start;
		$end = (string)$end;
		foreach($this->data as $key => &$value) {
			$key = (string)$key;
			if($start == $key || $collecting) {
				$collecting = true;
				$ret->setByReference($key, $value);
				if($end == $key) {
					break;
				}
			}
		}
		return $ret;
	}