protected RefInfo getResponseRefInfo(final JsonObject docInfo) {
        return Optional.ofNullable(docInfo.getAsJsonObject("responses"))
            .flatMap(jsonObject -> Optional.ofNullable(jsonObject.getAsJsonObject("200")))
            .flatMap(jsonObject -> Optional.ofNullable(jsonObject.getAsJsonObject("schema")))
            .map(this::getRefInfo)
            .orElse(null);
    }
Simple object return, pure array return.

@param docInfo docInfo
@return RefInfo
shenyu-admin/src/main/java/org/apache/shenyu/admin/service/manager/impl/SwaggerDocParser.java