31     assert(Anchor != nullptr);  in addAfter()
32     assert(Anchor->Parent != nullptr);  in addAfter()
33     assert(New->Parent == nullptr);  in addAfter()
34     assert(New->NextSibling == nullptr);  in addAfter()
35     assert(New->PreviousSibling == nullptr);  in addAfter()
36     assert(New->isDetached());  in addAfter()
37     assert(Role != NodeRole::Detached);  in addAfter()
49     assert(Old != nullptr);  in replace()
50     assert(Old->Parent != nullptr);  in replace()
51     assert(Old->canModify());  in replace()
52     assert(New->Parent == nullptr);  in replace()
53     assert(New->NextSibling == nullptr);  in replace()
54     assert(New->PreviousSibling == nullptr);  in replace()
55     assert(New->isDetached());  in replace()
66     assert(N != nullptr);  in remove()
67     assert(N->Parent != nullptr);  in remove()
68     assert(N->canModify());  in remove()
81   assert(S);  in removeStatement()
82   assert(S->canModify());  in removeStatement()