Source Generators: IDE change signature on replacing member should propagate to original

[VSadov]

Reordering parameters via "change signature" in the second Foo, does not propagate to the original Foo and causes compile errors (and that triggers an assert in IDE).

        static int Foo(int x, object y)
        {
            return x;
        }

        replace static int Foo(int x, object y)
        { 
            return original(x, y) + 1;   // <--- Extract this line
        }