update method
Copies the all values of the given node to the current node value.
Implementation
@override
void update(NodeValue nodeValue) {
NodeValueImpl n2 = nodeValue as NodeValueImpl;
_key = n2.key;
_value.clear();
for (var e in n2._value.entries) {
_value[e.key] = e.value;
}
_type = n2.type;
_description.clear();
for (var e in n2._description.entries) {
_description[e.key] = e.value;
}
_lastModified = nodeValue._lastModified;
}