keysIn method
Source keys covered by range, without inventing omitted context.
Implementation
Iterable<DiffCommentLineKey> keysIn(DiffReviewRange range) sync* {
final keys = _keysByFileSide[(range.start.path, range.start.side)];
if (keys == null) return;
for (
var i = _lowerBound(keys, range.start.line);
i < keys.length && keys[i].line <= range.end.line;
i++
) {
yield keys[i];
}
}