return asStream(diagnosticId + ".zip").contentTypeOctetStream().stream(out -> {
            try (ZipOutputStream zos = new ZipOutputStream(out.stream())) {
                writeLogFiles(zos, diagnosticId);
                writeSystemProperties(zos, diagnosticId);
                writeFessBasicConfig(zos, diagnosticId);

import java.io.IOException
import java.nio.charset.StandardCharsets
import java.nio.file.Files
import java.nio.file.LinkOption
import java.util.stream.Collectors
import java.util.zip.ZipEntry
import java.util.zip.ZipOutputStream
import javax.inject.Inject
import kotlin.collections.component1
import kotlin.collections.component2
import kotlin.collections.set
import kotlin.streams.toList