okio.ForwardingSource -> xt0:
# {"id":"sourceFile","fileName":"ForwardingSource.kt"}
    okio.Source delegate -> f
      # {"id":"com.android.tools.r8.residualsignature","signature":"Lfq2;"}
    4:6:void <init>(okio.Source):20:20 -> <init>
      # {"id":"com.android.tools.r8.residualsignature","signature":"(Lfq2;)V"}
    7:9:void <init>(okio.Source):21:21 -> <init>
    1:6:void close():32:32 -> close
    1:7:okio.Timeout timeout():29:29 -> f
      # {"id":"com.android.tools.r8.residualsignature","signature":"()Lc03;"}
    4:10:long read(okio.Buffer,long):27:27 -> h
      # {"id":"com.android.tools.r8.residualsignature","signature":"(JLdr;)J"}
    1:36:java.lang.String toString():34:34 -> toString
