addListener method
Adds a listener
callback for selection changes at any index.
Implementation
void addListener(ItemSelectionChangeCallback listener) {
assert(_debugAssertNotDisposed());
_listeners!.add(listener);
}
Adds a listener
callback for selection changes at any index.
void addListener(ItemSelectionChangeCallback listener) {
assert(_debugAssertNotDisposed());
_listeners!.add(listener);
}