Valid args to randomize() Method

In reply to Have_A_Doubt:

As you have already seen, some tools accept it, other tools don’t.

The built-in randomize is a peculiar construct in that its actual arguments are looked at from the perspective of the object it it is being called on, which is the same as how the with clause works, so I would expect it to be considered already inside the context of randomize method. But the LRM is not very clear on exactly what the arguments to the randomize method could be, just that they are variable names.