visitListener method
Implementation
void visitListener(ListenerVisitor visitor) {
for (var group in _groupPointers.entries) {
final name = group.key;
for (var item in group.value.entries) {
visitor(name, item.value);
}
}
}
void visitListener(ListenerVisitor visitor) {
for (var group in _groupPointers.entries) {
final name = group.key;
for (var item in group.value.entries) {
visitor(name, item.value);
}
}
}