whole_func_string: function trackEnd(event, properties) {
    RNSensorsAnalytics && RNSensorsAnalytics.trackEnd && RNSensorsAnalytics.trackEnd(event, properties);
  }
func_code_string: function trackEnd(event, properties) {
    RNSensorsAnalytics && RNSensorsAnalytics.trackEnd && RNSensorsAnalytics.trackEnd(event, properties);
  }
func_documentation_string: 事件结束
  
  @param event
  @param properties