-keepclassmembers class unified.vpn.sdk.HydraTransport$ApiHeaderListener {
    *** protect(...);
    *** onHdr(...);
}
-keep class unified.vpn.sdk.HydraHeaderListener { *; }
-keep class unified.vpn.sdk.AFHydra {*;}
-keep class unified.vpn.sdk.Ptm {*;}
-keep class unified.vpn.sdk.HydraConnInfo {*;}