The lowest hierarchy level to descend to for this dataset type,
for example "amp" for "raw" or "ccd" for "calexp".
Use "" to use the mapper’s default for the dataset type.
This class does not support None, but if it did, None
would mean the level should not be restricted.
Deprecated since version v23.0: Gen2 DataIdContainer is no longer supported. This functionality
has been disabled.