apollo-client/src/main/java/com/ctrip/framework/apollo/spring/util/SpringInjector.java/SpringInjector/getInstance
class SpringInjector:  public static <T> T getInstance(Class<T> clazz) {
    try {
      return getInjector().getInstance(clazz);
    } catch (Throwable ex) {
      Tracer.logError(ex);
      throw new ApolloConfigException(
          String.format("Unable to load instance for %s!", clazz.getName()), ex);
    }
  }