    # File lib/gettext/runtime/textdomain_manager.rb, line 65
        def bind_to(klass, domainname, options = {})
          warn "Bind the domain '#{domainname}' to '#{klass}'. " if $DEBUG

          charset = options[:output_charset] || self.output_charset
          textdomain = create_or_find_textdomain(domainname,options[:path],charset)
          target_klass = ClassInfo.normalize_class(klass)
          create_or_find_textdomain_group(target_klass).add(textdomain)
          @@gettext_classes << target_klass unless @@gettext_classes.include? target_klass

          textdomain
        end