src/vs/platform/terminal/common/capabilities/bufferMarkCapability.ts/BufferMarkCapability/markers
class BufferMarkCapability:	*markers(): IterableIterator<IMarker> {
		for (const m of this._idToMarkerMap.values()) {
			yield m;
		}
		for (const m of this._anonymousMarkers) {
			yield m;
		}
	}