Class not found when loading a library

Inside this library, i have a class defined that is :

class anythingToDo{
...
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How can i create an object anythingToDo in another part of the project that is not in the FileDoSomething?

Have you tried:

PHP Code:

$todo = new anythingToDo(); 


as long as the FileDoSomething is included, that should work, right?