public static ICommand CreateCommand(Arguments arguments)
        {
            string c = arguments.GetArgumentValueWithoutAssertion(Arguments.REQUEST_ARG);

            if (!string.IsNullOrEmpty(c))
                return new RestCommand(arguments);

            c = arguments.GetArgumentValueWithoutAssertion(Arguments.INSTALL);
            
            if (!string.IsNullOrEmpty(c))
                return new InstallCommand(arguments);

            throw new UnKnownCommandException();
        }