add_textdomain (GetText::TextDomainManager)

    # File lib/gettext/textdomainmanager.rb, line 62
        def add_textdomain(domainname, options = {})
          path = options[:path]
          if $DEBUG
            $stderr.print "Bind the domain '#{domainname}' to '#{@target}'. "
            $stderr.print "Current locale is #{@locale.inspect}\n"
          end
          textdomain = @@textdomain_all[domainname]
          if textdomain
            textdomain.set_locale(@locale)
          else
            textdomain = TextDomain.new(domainname, path, @locale)
            @@textdomain_all[domainname] = textdomain
          end
            @textdomains[domainname] = textdomain
          textdomain
        end