add method
Add individual Access Matrix
Implementation
void add(TGAccessMatrixVO accessMatrixVO) {
list.add(accessMatrixVO);
String mapKey = _mapKey(accessMatrixVO.key!, accessMatrixVO.roleId);
if (flags.containsKey(mapKey)) flags.remove(mapKey);
flags.putIfAbsent(mapKey, () => _mapValue(accessMatrixVO));
}