# File ruby/bstream.rb, line 668
        def build_by_sender(sid,name,args)
          @sid = sid
          @name = name
          @args = args
          raise IOError.new("(bug) Argument is not an instance of Array. #{args.class} : #{args}") unless @args.kind_of?(Array)
          @args = [] if @args == nil
          return self
        end