formapro/Fumocker — comment on commit 6b791ea825652e13f73baceae249b40dd445b3e4
File: src/Fumocker/Proxy.php line 45
By vatson:

Agree. Also we should reject to check a function existence. I see the use case that is contrary to this:

* When we want to substitute a nonexistent function. Yeah, it can be in the real life. I.E. you wrote a lib that uses some 3rd party code. You don't want to include this code to your standard package. You want to just mark it as a dependency with another library. And there you may want to do a stub to isolate your code