addSymbols method
Adds multiple symbols to the map, configured using the specified custom
options.
Change listeners are notified once the symbol has been added on the platform side.
The returned Future completes with the added symbol once listeners have been notified.
Implementation
Future<List<Symbol>> addSymbols(List<SymbolOptions> options,
[List<Map>? data]) async {
final symbols = [
for (var i = 0; i < options.length; i++)
Symbol(getRandomString(),
SymbolOptions.defaultOptions.copyWith(options[i]), data?[i])
];
await symbolManager!.addAll(symbols);
notifyListeners();
return symbols;
}