writeAll method
Implementation
@override
void writeAll(List<int> bs, [int off = 0, int? len]) {
len ??= bs.length;
if ((off < 0) ||
(off > bs.length) ||
(len < 0) ||
((off + len) - bs.length > 0)) {
throw ArgumentError("Index out of bounds");
}
_ensureCapacity(count + len);
buf.setRange(count, count + len, bs, off);
count += len;
}