protected Mono<byte[]> openapiYaml(ServerHttpRequest serverHttpRequest, String apiDocsUrl, Locale locale)
			throws JsonProcessingException {
		String serverBaseUrl = calculateServerUrl(serverHttpRequest, apiDocsUrl, locale);
		OpenAPI openAPI = this.getOpenApi(serverBaseUrl, locale);
		return Mono.just(writeYamlValue(openAPI));
	}
Openapi yaml mono.

@param serverHttpRequest the server http request
@param apiDocsUrl        the api docs url
@param locale            the locale
@return the mono
@throws JsonProcessingException the json processing exception
springdoc-openapi-starter-webflux-api/src/main/java/org/springdoc/webflux/api/OpenApiResource.java