@java.lang.Override
    public long getDirectoriesFailedToListFromSource() {
      return directoriesFailedToListFromSource_;
    }
<pre>
For transfers involving PosixFilesystem only.

Number of listing failures for each directory found at the source.
Potential failures when listing a directory include permission failure or
block failure. If listing a directory fails, no files in the directory are
transferred.
</pre>

<code>int64 directories_failed_to_list_from_source = 18;</code>

@return The directoriesFailedToListFromSource.
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java