Question

So, a method that alters its object is a mutator. A method that does not alter its object but returns a value (or reference to a value) is a getter. Is there a widely used name for a method that does not alter its object, does not return a value, but potentially alters objects passed to it as arguments. That is, a method that would only every be called for its side-effects on the arguments.

These methods are quite common if you are keen on the Strategy design pattern.

Answer 1

Is there an widely used name for a method that does not alter its object, does not return a value, but potentially alters objects passed to it as arguments.

The lack of replies suggests that, no, there is no widely used name for such a method.