code: function executeCommand(parameters) {
      let msg = '\n  ' + icli.format.ko('Unknown command \n\n');
      msg += '  Enter ' + icli.format.cmd('myrmex -h') + ' to see available commands\n';
      msg += '  You have to be in the root folder of your Myrmex project to see commands implemented by Myrmex plugins\n';
      console.log(msg);
      process.exit(1);
    }
docs: Show an error if a unknown command was called
  @param {Object} parameters - the parameters provided in the command and in the prompt
  @returns {void} - the execution stops here