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java.util.ArrayList cannot be cast to java.util.Map
java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.util.Map	at com.packtpub.materialdesign4.TileContentFragment$1$1.onDataChange(TileContentFragment.java:82)	at com.google.android.gms.internal.zzakg.zza(Unknown Source)	at com.google.android.gms.internal.zzalg.zzcxk(Unknown Source)	at com.google.android.gms.internal.zzalj$1.run(Unknown Source)	at android.os.Handler.handleCallback(Handler.java:739)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:148)	at android.app.ActivityThread.main(ActivityThread.java:5527)	at java.lang.reflect.Method.invoke(Native Method)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)