Spring UriBuilder replaceQueryParam not working

I am using spring web-flux webclient and i am passing b as null, but replaceQueryParam is still adding b param in uri. Not sure if i am doing something wrong or is there any bug.

public List<Response> getPermissions(String a, String b, String c) {
        return webClient.get()
                .uri(uriBuilder -> uriBuilder
                        .path(tenantInformationProvider.getRawTenant() + "/a/b")
                        .queryParam("a",a).replaceQueryParam("b", b)
                        .replaceQueryParam("c", c).build())
                .header("Authorization", "Bearer " + userInformationProvider.getToken()).retrieve()
                .onStatus(HttpStatus::is4xxClientError, res -> Mono.error(new Exception("4XX received from API")))
                .onStatus(HttpStatus::is5xxServerError, res -> Mono.error(new Exception("Internal server occured")))
                .bodyToMono(new ParameterizedTypeReference<List<Response>>() {
                }).log().block();
    }

replaceQueryParam(String name, Object... values)

passing null to varargs argument still treating as not null and ultimately adding that param in URI. How can i ignore the param if its value is null?

Comment From: sbrannen

You have to use replaceQueryParam("b") instead of replaceQueryParam("b", null).

So you'll have to perform that within an if-block to check if the value of b is null.

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