dispose method Null safety
Implementation
void dispose() {
if (_keepAliveTimer != null) {
_keepAliveTimer!.cancel();
}
if (_transport != null) {
_transport?.dispose();
}
}
void dispose() {
if (_keepAliveTimer != null) {
_keepAliveTimer!.cancel();
}
if (_transport != null) {
_transport?.dispose();
}
}