private List<OldSwitchStatementBranch> getWithFallthroughBranches() {
      List<OldSwitchStatementBranch> withPrevious = new ArrayList<>();
      OldSwitchStatementBranch current = this;
      while (true) {
        withPrevious.add(current);
        current = current.myPreviousSwitchBranch;
        if (current == null || current.myStatements.length != 0 || !current.myIsFallthrough) {
          return withPrevious;
        }
      }
    }
private List<OldSwitchStatementBranch> getWithFallthroughBranches()