rtcEngine$onLicenseWillExpire method
@hidden internal use only @detail callabck @author wangyu.1705 @brief License expiration time reminder @param engine ByteRTCEngine{@link #ByteRTCEngine} object. @param days Expiration time in days
Implementation
FutureOr<void> rtcEngine$onLicenseWillExpire(
ByteRTCEngine engine, NSInteger days) async {}