WebClient calling an imaginary web api

ApiCaller.java

class ApiCaller {

    private WebClient webClient;

    ApiCaller(WebClient webClient) {
        this.webClient = webClient;
    }

    Mono<SimpleResponseDto> callApi() {
        return webClient.put()
                .uri("/api/resource")
                .contentType(MediaType.APPLICATION_JSON)
                .header("Authorization", "customAuth")
                .syncBody(new SimpleRequestDto())
                .retrieve()
                .bodyToMono(SimpleResponseDto.class);
    }
}