index.js
function track(event, properties) {
  RNSensorsAnalytics && RNSensorsAnalytics.track && RNSensorsAnalytics.track(event, properties);
}
function track(event, properties) {
  RNSensorsAnalytics && RNSensorsAnalytics.track && RNSensorsAnalytics.track(event, properties);
}
追踪事件

@param event
@param properties