apollo-client/src/main/java/com/ctrip/framework/apollo/internals/DefaultInjector.java/DefaultInjector/DefaultInjector
class DefaultInjector:  public DefaultInjector() {
    try {
      m_injector = Guice.createInjector(new ApolloModule());
      m_customizers = ServiceBootstrap.loadAllOrdered(ApolloInjectorCustomizer.class);
    } catch (Throwable ex) {
      ApolloConfigException exception = new ApolloConfigException("Unable to initialize Guice Injector!", ex);
      Tracer.logError(exception);
      throw exception;
    }
  }