initWithURL_append_ method
Implementation
NSOutputStream? initWithURL_append_(NSURL url, bool shouldAppend) {
final _ret = _lib._objc_msgSend_861(
_id, _lib._sel_initWithURL_append_1, url._id, shouldAppend);
return _ret.address == 0
? null
: NSOutputStream._(_ret, _lib, retain: true, release: true);
}