# File lib/test/unit/omission.rb, line 77
      def omit(message=nil, &block)
        message ||= "omitted."
        if block_given?
          omission = Omission.new(name, filter_backtrace(caller), message)
          add_omission(omission)
        else
          raise OmittedError.new(message)
        end
      end