addWayholder method
Implementation
void addWayholder(Wayholder wayholder) {
assert(content == null);
assert(wayholder.openOutersRead.isNotEmpty || wayholder.closedOutersRead.isNotEmpty);
wayholders.add(wayholder);
++wayCount;
//count += wayholder.openOuters.length + wayholder.closedOuters.length;
}