# File lib/spec/mocks/proxy.rb, line 52
      def add_negative_message_expectation(expected_from, sym, &block)
        __add sym
        warn_if_nil_class sym
        @expectations << NegativeMessageExpectation.new(@error_generator, @expectation_ordering, expected_from, sym, block_given? ? block : nil)
        @expectations.last
      end