从这个线程开始，我被要求尝试实现lessphp，看看它是否与商业应用程序的当前版本兼容（最初开发时它不是）。
我已经使用 composer 成功安装了 bundle 并按照如下说明设置了配置：
filters:
lessphp:
file: %kernel.root_dir%/../vendor/leafo/lessphp/lessc.inc.php
apply_to: "\.less$"
# Formatter options: compressed, lessjs, classic
formatter: "compressed"
preserve_comments: false
我已经确认不太主要的类加载良好，并带有一个好的 ol' die 语句。
但我在尝试时收到以下错误assetic/dump。
Fatal error: Call to undefined method Assetic\Filter\LessphpFilter::setLoadPaths() in C:\Dropbox\xampp\htdocs\SBSonline\sbsonline-v2\app\cache\dev\appDevDebugProjectContainer.php on line 118
Call Stack:
0.0002 126720 1. {main}() C:\Dropbox\xampp\htdocs\SBSonline\sbsonline-v2\app\console:0
0.0150 1257016 2. Symfony\Component\Console\Application->run() C:\Dropbox\xampp\htdocs\SBSonline\sbsonline-v2\app\console:22
0.0187 1405928 3. Symfony\Bundle\FrameworkBundle\Console\Application->doRun() C:\Dropbox\xampp\htdocs\SBSonline\sbsonline-v2\vendor\symfony\symfony\src\Symfony\Component\Console\Application.php:105
3.2818 28230888 4. Symfony\Component\Console\Application->doRun() C:\Dropbox\xampp\htdocs\SBSonline\sbsonline-v2\vendor\symfony\symfony\src\Symfony\Bundle\FrameworkBundle\Console\Application.php:78
3.2841 28231512 5. Symfony\Component\Console\Command\Command->run() C:\Dropbox\xampp\htdocs\SBSonline\sbsonline-v2\vendor\symfony\symfony\src\Symfony\Component\Console\Application.php:199
3.2844 28233736 6. Symfony\Bundle\AsseticBundle\Command\DumpCommand->initialize() C:\Dropbox\xampp\htdocs\SBSonline\sbsonline-v2\vendor\symfony\symfony\src\Symfony\Component\Console\Command\Command.php:227
3.2844 28233960 7. Symfony\Component\DependencyInjection\Container->get() C:\Dropbox\xampp\htdocs\SBSonline\sbsonline-v2\vendor\symfony\assetic-bundle\Symfony\Bundle\AsseticBundle\Command\DumpCommand.php:53
3.2845 28234360 8. appDevDebugProjectContainer->getAssetic_AssetManagerService() C:\Dropbox\xampp\htdocs\SBSonline\sbsonline-v2\app\bootstrap.php.cache:211
3.2845 28234424 9. Symfony\Component\DependencyInjection\Container->get() C:\Dropbox\xampp\htdocs\SBSonline\sbsonline-v2\app\cache\dev\appDevDebugProjectContainer.php:61
3.2845 28234768 10. appDevDebugProjectContainer->getAssetic_AssetFactoryService() C:\Dropbox\xampp\htdocs\SBSonline\sbsonline-v2\app\bootstrap.php.cache:211
3.2845 28235776 11. Symfony\Component\DependencyInjection\Container->get() C:\Dropbox\xampp\htdocs\SBSonline\sbsonline-v2\app\cache\dev\appDevDebugProjectContainer.php:3700
3.2845 28236112 12. appDevDebugProjectContainer->getAssetic_Filter_LessphpService() C:\Dropbox\xampp\htdocs\SBSonline\sbsonline-v2\app\bootstrap.php.cache:211
有人可以帮忙吗？我有一种感觉，我错过了一些明显的东西，但我找不到它。