How to find the corresponding hard disk object through the name of the hard disk, not through the VM hardware device

hi，
Now，I have a requirement to find hard disk objects by the name of the hard disk in the database。I found some methods in the pyvmomi-community-samples project，There is a method called storage. ListVStorageObject () . Return empty list parameters all the time，
I suspect it was my parameter passing error，So that the for loop in the function can't execute。
I hope you can help me solve it. Thank you very much !!!

def search_disk(disk_name=None):
    """
    Query the corresponding hard disk objects in VC according to the parameters of hard disk
    :return:
    """
    with VCenter(host='xxx', username='xxx', password='xxx') as vc:
        # Set vStorageObjectManager
        storage = vc.content.vStorageObjectManager

        # Retrieve First Class Disks
        disk = None

        dataStore = get_ds_obj(content=vc.content,vimtype=[vim.Datastore],name='TYPE02')
        for d in storage.ListVStorageObject(dataStore):
            disk_info = storage.RetrieveVStorageObject(d, dataStore)
            if disk_info.config.name == disk_name:
                disk = disk_info
                break
        if not disk:
            raise RuntimeError("First Class Disk not found.")
        return disk

Start with the posted search_disk function, especially the get_ds_obj call and storage.ListVStorageObject(dataStore) invocation. Reproduce the empty result with the supplied parameters and inspect the pyvmomi-community-samples implementation. Done means identifying whether the datastore or argument usage causes the empty list and reporting the correct usage.