classes/Routing/Router.php
public function group(array $flags, Closure $callback)
	{
		if ($this->isCaching()) {
			return;
		}

		$oldPrefix = $this->currentPrefix;
		$oldHooks = $this->currentHooks;

		foreach (['before', 'after'] as $when) {
			if (isset($flags[$when])) {
				foreach ((array) $flags[$when] as $hook) {
					$this->currentHooks[] = [$when, $this->getHook($hook)];
				}
			}
		}

		if (isset($flags['prefix'])) {
			$this->currentPrefix .= '/' . trim($flags['prefix'], '/');
		}

		$callback($this);

		$this->currentPrefix = $oldPrefix;
		$this->currentHooks = $oldHooks;
	}
public function group(array $flags, Closure $callback)
	{
		if ($this->isCaching()) {
			return;
		}

		$oldPrefix = $this->currentPrefix;
		$oldHooks = $this->currentHooks;

		foreach (['before', 'after'] as $when) {
			if (isset($flags[$when])) {
				foreach ((array) $flags[$when] as $hook) {
					$this->currentHooks[] = [$when, $this->getHook($hook)];
				}
			}
		}

		if (isset($flags['prefix'])) {
			$this->currentPrefix .= '/' . trim($flags['prefix'], '/');
		}

		$callback($this);

		$this->currentPrefix = $oldPrefix;
		$this->currentHooks = $oldHooks;
	}
{@inheritdoc}