public static Path getExplodedContentPacksDir() {
        try {
            Files.createDirectories(EXPLODED_DIR);
        } catch (IOException e) {
            throw new RuntimeException(LogUtil.message(
                    "Error ensuring directory {}",
                    EXPLODED_DIR.toAbsolutePath()), e);
        }
        return EXPLODED_DIR;
    }
@return The directory where content pack zips are unzipped to.
It will ensure it exists.
stroom-test-common/src/main/java/stroom/test/common/util/test/FileSystemTestUtil.java