kotlin.io.FileTreeWalk$FileTreeWalkIterator$TopDownDirectoryState -> ip0:
# {"id":"sourceFile","fileName":"FileTreeWalk.kt"}
    boolean rootVisited -> b
    java.io.File[] fileList -> c
    int fileIndex -> d
    1:7:java.io.File step():166:166 -> a
    8:10:java.io.File step():172:172 -> a
    11:24:java.io.File step():174:174 -> a
    25:32:java.io.File step():177:177 -> a
    33:36:java.io.File step():181:181 -> a
    37:50:java.io.File step():187:187 -> a
