Not sure if this is a bug, but the docs might be confusing me.  I'm trying a simple test to see if I can download specific files directly from a specific location in a storage account.  I created a storage account and manually uploaded a foo.txt file to an "artifacts" File Share under a subfolder called Secrets.  I uploaded a copy off another in a different subfolder (Azure-Storage-Upload) of the same File Share

The pipeline syntax step suggests that downloading from the File Share is possible and that files can be downloaded using ant fileset syntax (I attached a screenshot of the syntax help)

I created a simple pipeline:

pipeline{
    agent any    
    stages{
        stage ('Do Something'){
            steps{
                echo 'download'
                azureDownload downloadType: 'share', 
                    fileShare: 'artifacts', 
                    includeFilesPattern: 'Secrets/foo.txt', 
                    storageCredentialId: 'jenkins-devops-test-02'          
            }
        }
    }
}

No matter the ant syntax I've tried, I cannot download the specific foo.txt from the "Secrets" subfolder.  I've tried all sorts of combinations such as:  /Secrets/.txt, **/Secrets/*, Secrets/foo.txt, Secrets\foo.txt, etc., etc., etc.

[Pipeline] echo
download
[Pipeline] azureDownload
MicrosoftAzureStorage - Downloading files from Azure storage
MicrosoftAzureStorage - Need to be downloaded file count =  0
MicrosoftAzureStorage - No file was downloaded from Azure storage.
 Verify that files exist with specified blob or share.
[Pipeline] }

However, when I use just "foo.txt" in includeFilesPattern value, both foo.txt files are downloaded from the storage account's File Share.  Given there's not a foo.txt in the root of the "artifacts" File Share this should not have occurred.  

[Pipeline] echo
download
[Pipeline] azureDownload
MicrosoftAzureStorage - Downloading files from Azure storage
Downloading file:https://ouraccount.file.core.windows.net/artifacts/Azure-Storage-Upload/foo.txt
MicrosoftAzureStorage - Need to be downloaded file count =  2
Downloading file:https://ouraccount.file.core.windows.net/artifacts/Secrets/foo.txt
blob foo.txt is downloaded to D:\jenkins\home\jobs\Azure-Pipeline-Test\workspace in 00:00:00.197 (HH:mm:ss.S)
blob foo.txt is downloaded to D:\jenkins\home\jobs\Azure-Pipeline-Test\workspace in 00:00:00.444 (HH:mm:ss.S)
MicrosoftAzureStorage - Downloaded file count =  2
[Pipeline] }

It appears that the plugin isn't using ant like syntax when it comes to downloading files in a tree in a storage account's "File Share".  While I could make something work for my needs, the docs might need to be adjusted to avoid confusion if the ability to pull specific, manually uploaded files from a given subdir under a File Share will not be supported.  If it is, or will be possible, any guidance would be appreciated.  It could be a pretty handy feature!