pushArray method
Append bytes */
Implementation
void pushArray(List<int> v) {
// reserve(v.length);
// var t = Uint8List.view(array.buffer,0,array.length + v.length);
// t.replaceRange(array.length, array.length + v.length - 1, v);
// array = t;
var t = array!.toList();
t.addAll(v);
array = Uint8List.fromList(t);
length += v.length;
}