Used to fetch values of large objects when they are explicitly requested.
property DeferredBlobRead: boolean default True;
Use the DeferredBlobRead property to fetch values of large objects when they are explicitly requested.
If True, values of large objects are only fetched when they are explicitly requested.
Otherwise all values of large objects are fetched when dataset is opened. This option has no sence when the CacheBlobs option is set to False.