.testForwarding(
            interfaceType,
            delegate -> {
              T mock = mock(forwarderClass, CALLS_REAL_METHODS);
              try {
                T stubber = doReturn(delegate).when(mock);
                DELEGATE_METHOD.invoke(stubber);
              } catch (Exception e) {
                throw new RuntimeException(e);
              }
              return mock;
            });
  }

        .testForwarding(
            interfaceType,
            delegate -> {
              T mock = mock(forwarderClass, CALLS_REAL_METHODS);
              try {
                T stubber = doReturn(delegate).when(mock);
                DELEGATE_METHOD.invoke(stubber);
              } catch (Exception e) {
                throw new RuntimeException(e);
              }
              return mock;
            });
  }

        final Map<String, Object> source = new LinkedHashMap<>();
        source.put("title", "Title with \"quotes\" and \\backslash");
        source.put("content", "Line1\nLine2\tTabbed");

        final String json = new JsonIndexExportFormatter().format(source, Collections.emptySet());

        assertTrue(json.contains("\\\"quotes\\\""));
        assertTrue(json.contains("\\\\backslash"));

\u0000\u4000\ubb77\u0000\u4000\ubb81\u0000\u4000\ubb8e\u0000\u4000\ubb97\u0000\u4000\ubba1\u0000\u4000\ubba9\u0000\u4000\ubbb3\u0000\u4000\ubbbb\u0000\u4000\ubbc4\u0000\u4000\ubbca\u0000\u4000\ubbd1\u0000\u4000\ubbda\u0000\u4000\ubbe3\u0000\u4000\ubbed\u0000\u4000\ubbf5\u0000\u4000\ubbfb\u0000\u4000\ubc05\u0000\u4000\ubc0c\u0000\u4000\ubc11\u0000\u4000\ubc18\u0000\u4000\ubc21\u0000\u4000\ubc29\u0000\u4000\ubc32\u0000\u4000\ubc3c\u0000\u4000\ubc44\u0000\u4000\ubc4b\u0000\u4000\ubc50\u0000\u4000\u...