var mut = subparser.addMutuallyExclusiveGroup();
mut.addArgument("-m", "--message").help("Specify the message to be sent.");
mut.addArgument("--message-from-stdin")
.action(Arguments.storeTrue())
.help("Read the message from standard input.");
var mut = subparser.addMutuallyExclusiveGroup();
mut.addArgument("-m", "--message").help("Specify the message to be sent.");
mut.addArgument("--message-from-stdin")
.action(Arguments.storeTrue())
.help("Read the message from standard input.");