com.google.android.gms.tasks.TaskExecutors -> ch7:
# {"id":"sourceFile","fileName":"com.google.android.gms:play-services-tasks@@18.1.0"}
    java.util.concurrent.Executor MAIN_THREAD -> a
      # {"id":"com.android.tools.r8.residualsignature","signature":"Lrz2;"}
    java.util.concurrent.Executor zza -> b
      # {"id":"com.android.tools.r8.residualsignature","signature":"Lrv1;"}
    1:10:void <clinit>():1:1 -> <clinit>
    11:13:void com.google.android.gms.tasks.zzt.<init>():0:0 -> <clinit>
    11:13:void <clinit>():1 -> <clinit>
    14:16:void <clinit>():1:1 -> <clinit>
