public static void attachToSubparser(final Subparser subparser) {
subparser.help("Block the given contacts or groups (no messages will be received)");
subparser.addArgument("contact").help("Contact number").nargs("*");
public static void attachToSubparser(final Subparser subparser) {
subparser.help("Block the given contacts or groups (no messages will be received)");
subparser.addArgument("contact").help("Contact number").nargs("*");