operator [] method
The object at the given index
in the list.
The index
must be a valid index of this list,
which means that index
must be non-negative and
less than length.
Implementation
@override
bool operator [](int index) {
final bufIndex = index ~/ 8;
return ((_buffer[bufIndex] >> (7 - index % 8)) & 1) == 1;
}