# File lib/rspec/mocks/proxy.rb, line 67
      def add_message_expectation(location, method_name, opts={}, &block)        
        meth_double = method_double[method_name]

        if null_object? && !block
          meth_double.add_default_stub(@error_generator, @expectation_ordering, location, opts) do
            @object
          end
        end

        meth_double.add_expectation @error_generator, @expectation_ordering, location, opts, &block
      end