How to get list of child files/directories having parent DataLakeDirectoryClient class instance

I have to scan whole data lake file system. Having code like:

PagedIterable<PathItem> pItems = ((DataLakeFileSystemClient)prmParent).listPaths();
for( PathItem pItem : pItems ){
  if pItem.isDirectory() ){
    ((DataLakeFileSystemClient)prmParent).getDirectoryClient(pItem.getName());
  } else {
    ((DataLakeFileSystemClient)prmParent).getFileClient(pItem.getName());
  }
}

I get top level dirs/files. But to drill down there must be method listChild() in DataLakeDirectoryClient class.
But i did not find anything similar.
Does anybody know what is the proper way to walk thru the tree?

Thanks. Sergiy

If you want to list all path in Azure data lake gen2 file system, please refer to the following code

 StorageSharedKeyCredential credential = new StorageSharedKeyCredential(accountName, accountKey);
        String endpoint = String.format(Locale.ROOT, "https://%s.dfs.core.windows.net", accountName);
        DataLakeServiceClient storageClient = new DataLakeServiceClientBuilder()
                .endpoint(endpoint)
                .credential(credential)
                .buildClient();

        DataLakeFileSystemClient dataLakeFileSystemClient = storageClient.getFileSystemClient("test");
        ListPathsOptions options = new ListPathsOptions();
        options.setRecursive(true);
        PagedIterable<PathItem> pItems = dataLakeFileSystemClient.listPaths(options,null);

        for( PathItem pItem : pItems ){
            if(pItem.isDirectory()) {
                System.out.println("The directory: " +pItem.getName());
            }else{
                System.out.println("The file : " +pItem.getName());
            }
        }

For more details, please refer to here