docs: private String findRequestUri(Shape parentShape, Map<String, Shape> allC2jShapes) {
          return builder.getService().getOperations().values().stream()
                  .filter(o -> o.getInput() != null)
                  .filter(o -> allC2jShapes.get(o.getInput().getShape()).equals(parentShape))
                  .map(o -> o.getHttp().getRequestUri())
                  .findFirst().orElseThrow(() -> new RuntimeException("Could not find request URI for input shape"));
      }