# File lib/rspec/mocks/message_expectation.rb, line 97
      def and_call_original
        if @method_double.object.is_a?(RSpec::Mocks::TestDouble)
          @error_generator.raise_only_valid_on_a_partial_mock(:and_call_original)
        else
          @implementation = @method_double.original_method
        end
      end