SpanBasedFormatter class abstract

Base class for formatters that use the span-based templating system.

Provides common functionality for building spans, applying transformers, and rendering to the buffer. Subclasses only need to implement buildSpan.

Example

class MyFormatter extends SpanBasedFormatter {
  MyFormatter({super.spanTransformers});

  @override
  LogSpan buildSpan(LogRecord record) {
    return SpanSequence(children: [
      Timestamp(record.date),
      Whitespace(),
      LogMessage(record.message),
    ]);
  }
}