code: public static void printHelp(PrintStream stream) throws IOException {
              stream.println();
              stream.println("NAME");
              stream.println("  meta set - Set metadata on nodes");
              stream.println();
              stream.println("SYNOPSIS");
              stream.println("  meta set <meta-key>=<meta-value>[,<meta-key2>=<meta-value2>] -u <url>");
              stream.println("           [-n <node-id-list> | --all-nodes] [--confirm]");
              stream.println();
              stream.println("COMMENTS");
              stream.println("  To set one metadata, please specify one of the following:");
              stream.println("    " + MetadataStore.CLUSTER_KEY
                             + " (meta-value is cluster.xml file path)");
              stream.println("    " + MetadataStore.STORES_KEY
                             + " (meta-value is stores.xml file path)");
              stream.println("    " + MetadataStore.SLOP_STREAMING_ENABLED_KEY);
              stream.println("    " + MetadataStore.PARTITION_STREAMING_ENABLED_KEY);
              stream.println("    " + MetadataStore.READONLY_FETCH_ENABLED_KEY);
              stream.println("    " + MetadataStore.QUOTA_ENFORCEMENT_ENABLED_KEY);
              stream.println("    " + MetadataStore.REBALANCING_SOURCE_CLUSTER_XML);
              stream.println("    " + MetadataStore.REBALANCING_STEAL_INFO);
              stream.println("    " + KEY_OFFLINE);
              stream.println("  To set a pair of metadata values, valid meta keys are:");
              stream.println("    " + MetadataStore.CLUSTER_KEY
                             + " (meta-value is cluster.xml file path)");
              stream.println("    " + MetadataStore.STORES_KEY
                             + " (meta-value is stores.xml file path)");
              stream.println();
              getParser().printHelpOn(stream);
              stream.println();
          }
docs: Prints help menu for command.
  
  @param stream PrintStream object for output
  @throws IOException