remove method
Implementation
VWVertex? remove() {
VWVertex? tmpPrev = prev;
VWVertex? tmpNext = next;
VWVertex? result;
if (prev != null) {
prev!.setNext(tmpNext!);
prev!.updateArea();
result = prev;
}
if (next != null) {
next!.setPrev(tmpPrev!);
next!.updateArea();
if (result == null) result = next;
}
isLive = false;
return result;
}