writeLong method
Implementation
void writeLong(int v, [Endian endian = Endian.big]) {
if (kIsWeb) {
Uint8List u64Buffer = u64BytesHelper(v);
_view = ByteData.view(u64Buffer.buffer);
_buffer = u64Buffer;
} else {
_view!.setInt64(0, v, endian);
}
write(_buffer.getRange(0, 8).toList());
}