addAll method
Appends all objects of iterable to the end of this NSMutableData.
The elements of the iterable should be integers in the range 0 to 255.
Any integer, which is not in that range, is converted to a byte as if by
value.toUnsigned(8).
Implementation
void addAll(Iterable<int> iterable) {
final f = malloc<Uint8>(iterable.length);
try {
f.asTypedList(iterable.length).setAll(0, iterable);
appendBytes(f.cast(), length: iterable.length);
} finally {
malloc.free(f);
}
}