Contributed by
Grégoire Pineau
in #9779.

Symfony 2.4 added great error messages for missing classes and functions. As of 2.5, Symfony will also help you debug undefined method calls.

Here is the kind of messages you will get in such cases:

"Attempted to call method "offsetFet" on class "SplObjectStorage" in foo.php line 12. Did you mean to call: "offsetSet", "offsetUnset", or "offsetGet"?"