Android Question GoogleMapsExtras – uk.co.martinpearman

java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/location/LocationRequest;
    at  uk.co.martinpearman.b4a.android.gms.location.LocationRequest.Initialize(LocationRequest.java:62)
    at b4a.identity.main._activity_create(main.java:377)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:221)
    at b4a.identity.main.afterFirstLayout(main.java:105)
    at b4a.identity.main.access$000(main.java:17)
    at b4a.identity.main$WaitForLayout.run(main.java:83)
    at android.os.Handler.handleCallback(Handler.java:958)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loopOnce(Looper.java:230)
    at android.os.Looper.loop(Looper.java:319)
    at android.app.ActivityThread.main(ActivityThread.java:8934)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:588)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
Caused by: java.lang.ClassNotFoundException: com.google.android.gms.location.LocationRequest