apollo-client/src/main/java/com/ctrip/framework/apollo/internals/InterestedConfigChangeEvent.java/InterestedConfigChangeEvent/InterestedConfigChangeEvent
class InterestedConfigChangeEvent:  public InterestedConfigChangeEvent(String namespace,
      Map<String, ConfigChange> changes, Set<String> interestedChangedKeys) {
    super(namespace, changes);
    this.m_interestedChangedKeys = interestedChangedKeys;
  }