close method
void
close()
Implementation
void close() {
assert(!isClosed, 'You cannot close a closed Stream');
_notifyDone();
_onData = null;
_isBusy = null;
_value = null;
}
void close() {
assert(!isClosed, 'You cannot close a closed Stream');
_notifyDone();
_onData = null;
_isBusy = null;
_value = null;
}