private bool TrySign(ReadOnlySpan <byte> content, Span <byte> destination, CoseSigner signer, bool isDetached, out int bytesWritten, byte[]?associatedData)
=> isDetached?
CoseSign1Message.TrySignDetached(content, destination, signer, out bytesWritten, associatedData) :
CoseSign1Message.TrySignEmbedded(content, destination, signer, out bytesWritten, associatedData);