Some use cases, such as test frameworks, may rely on supporting unknown magic methods, while still having a few of their own magic methods.

It'd be useful if those classes could indicate psalm shouldn't emit UndefinedMagicMethod for any of their use cases.

@psalm-no-seal-methods would be one way to do this. (or @no-seal-methods

https://github.com/ifwe/phockito/blob/bd1849468daf9539e052a3af9d11d981008397a8/Phockito.php#L617-L626 is one example of this - it supports both of the following syntaxes for the returned value of Phockito::when(...) (return() has a known type, someMethod() doesn't).

Phockito::when($mockObj)->someMethod()->return($value);
Phockito::when($mockObj->someMethod())->return($value);