record method
Records lines, evicting the oldest beyond the cap.
Implementation
void record(Iterable<LogLine> lines) {
for (final line in lines) {
final tail = _lines.putIfAbsent(line.nodeId, () => <LogLine>[])
..add(line);
if (tail.length > capacityPerNode) {
tail.removeRange(0, tail.length - capacityPerNode);
}
if (!_live.isClosed) _live.add(line);
}
}