You are browsing the documentation for Symfony 3.4 which is not maintained anymore.
Consider upgrading your projects to Symfony 5.3.
Debugging a Class Loader
Debugging a Class Loader¶
DebugClassLoader from the ClassLoader component was deprecated in
Symfony 2.5 and removed in Symfony 3.0. Use the
Symfony\Component\Debug\DebugClassLoader provided by the Debug
This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.