apollo-openapi/src/main/java/com/ctrip/framework/apollo/openapi/client/service/AbstractOpenApiService.java/AbstractOpenApiService/AbstractOpenApiService
class AbstractOpenApiService:  AbstractOpenApiService(CloseableHttpClient client, String baseUrl, Gson gson) {
    this.client = client;
    this.baseUrl = baseUrl;
    this.gson = gson;
  }