presto-benchmark-driver/src/main/java/io/prestosql/benchmark/driver/Suite.java/Suite/readSuites
class Suite:    public static List<Suite> readSuites(File file)
            throws IOException
    {
        requireNonNull(file, "file is null");
        checkArgument(file.canRead(), "Cannot read file: %s", file);
        byte[] json = Files.readAllBytes(file.toPath());
        Map<String, OptionsJson> options = mapJsonCodec(String.class, OptionsJson.class).fromJson(json);
        ImmutableList.Builder<Suite> runOptions = ImmutableList.builder();
        for (Entry<String, OptionsJson> entry : options.entrySet()) {
            runOptions.add(entry.getValue().toSuite(entry.getKey()));
        }
        return runOptions.build();
    }