blaa.command :ex do |example|
        example.flag :esrc, :default_value => nil, :arg_name => 'string', :desc => '3-letter ISO 693-3 source language code (Required)'
        example.flag :etar, :default_value => nil, :arg_name => 'string', :desc => '3-letter ISO 693-3 source language code (Required)'
        example.action do |global_options, options, args|
            if args.length > 1