Interface BodyCapture

True when the body is not valid UTF-8 (image, blob, …); text is omitted.

True when the response body was streamed to the client unbuffered instead of being captured here — the stream itself is never read to produce a trace snapshot, since the client is its only legitimate consumer. len/text/truncated/binary are all left at their defaults in this case, so a streamed response otherwise looks like an empty 0-byte body with no explanation.