How to use the backfill-logger.setLogLevel function in backfill-logger

export async function main(): Promise {
  try {
    const config = createConfig();
    const {
      cacheStorageConfig,
      clearOutputFolder,
      hashGlobs,
      internalCacheFolder,
      logFolder,
      logLevel,
      outputFolder,
      packageRoot
    } = config;

    if (logLevel) {
      setLogLevel(logLevel);
    }

    const helpString = "Backfills unchanged packages.";

    const argv = yargs
      .strict()
      .usage(helpString)
      .alias("h", "help")
      .version(false)
      .option("audit", {
        description: "Compare files changed with those cached",
        type: "boolean"
      }).argv;

    const buildCommand = createBuildCommand(
      argv["_"],