private static boolean isConvertibleBranch(@NotNull OldSwitchStatementBranch branch, boolean hasNext) {
    int length = branch.getStatements().length;
    if (length == 0) return (branch.isFallthrough() && hasNext) || (!branch.isFallthrough() && branch.isDefault());
    return !branch.isFallthrough();
  }
private static boolean isConvertibleBranch(@NotNull OldSwitchStatementBranch branch, boolean hasNext)