public static boolean isPrivate(Map<String, Object> args) throws RestServiceException {
    return getBooleanHeader(args, Headers.PRIVATE, false);
  }
Gets the isPrivate setting from the args.
@param args The args where to include the isPrivate setting.
@return A boolean to indicate the value of the isPrivate flag.
@throws RestServiceException if exception occurs during parsing the arg.
ambry-api/src/main/java/com/github/ambry/rest/RestUtils.java