public static function methods($class, $format = null, array $options = []) {
		$defaults = ['methods' => [], 'group' => true, 'self' => true];
		$options += $defaults;

		if (!(is_object($class) && $class instanceof ReflectionClass)) {
			try {
				$class = new ReflectionClass($class);
			} catch (ReflectionException $e) {
				return null;
			}
		}
		$options += ['names' => $options['methods']];
		$methods = static::_items($class, 'getMethods', $options);
		$result = [];

		switch ($format) {
			case null:
				return $methods;
			case 'extents':
				if ($methods->getName() === []) {
					return [];
				}

				$extents = function($start, $end) { return [$start, $end]; };
				$result = array_combine($methods->getName(), array_map(
					$extents, $methods->getStartLine(), $methods->getEndLine()
				));
			break;
			case 'ranges':
				$ranges = function($lines) {
					list($start, $end) = $lines;
					return ($end <= $start + 1) ? [] : range($start + 1, $end - 1);
				};
				$result = array_map($ranges, static::methods(
					$class, 'extents', ['group' => true] + $options
				));
			break;
		}

		if ($options['group']) {
			return $result;
		}
		$tmp = $result;
		$result = [];

		array_map(function($ln) use (&$result) { $result = array_merge($result, $ln); }, $tmp);
		return $result;
	}