instance property
The existing instance of this class, if any.
Throws if ensureInitialized has not been called at least once.
Implementation
static BinaryMessenger get instance {
if (_instance == null) {
throw StateError(
'The BackgroundIsolateBinaryMessenger.instance value is invalid '
'until BackgroundIsolateBinaryMessenger.ensureInitialized is '
'executed.');
}
return _instance!;
}