public ConfigureDaemons withOpts(Daemon daemon, String opts) {
      args.add("--" + StringUtils.lowerCase(daemon.name()) + "-opts=\"" + opts + "\"");
      return this;
    }
Specify additional Java opts to be included when the daemon starts.
@param daemon The daemon to add opts to.
@param opts Additional Java command line arguments.
@return A reference to this updated object so that method calls can be chained
        together.
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/util/BootstrapActions.java